Beautiful Japanese Names That Mean Sea To Inspire

Japanese names that mean sea are beautiful and easy to love. In Japan, the sea is a big part of everyday life. It is a symbol of peace, strength, freedom, and hope. Because of these meanings, many parents choose sea-inspired names for their children. These names are also common in stories, games, and anime.

Many of these names use kanji like 海 (umi), which means sea or ocean, 波 (nami), which means wave, 潮 (shio), which means tide, and 湊 (minato), which means harbor. Some names are about the sea itself. Others are inspired by waves, beaches, islands, or the coast.

In this guide, you will learn what Japanese names that mean sea mean, the kanji used to write them, and why people still like these names today.

Whether you are looking for a baby name, a name for a story character, or simply want to learn about Japanese names, you will find plenty of great ideas.

Why The Sea Is an Important Symbol In Japanese Names

Japan is made up of many islands and is surrounded by the sea. For a long time, the sea has been an important part of everyday life.

It provides food, helps people travel, and connects Japan with other places. The sea is also seen in Japanese stories, art, poems, and festivals.

Because the sea is so important, it has many positive meanings. It often stands for:

• Peace and calm
• Strength
• Freedom
• New beginnings
• Patience
• A love of nature
• Hope for the future

These positive meanings are one reason why Japanese names that mean sea are popular for both boys and girls.

Male Japanese Names That Mean Sea

Male Japanese Names That Mean Sea often represent strength, courage, and adventure. Many of these names are inspired by the ocean and reflect a strong connection to nature and the power of the sea.

• Umi (海) – Sea, ocean
• Kaito (海翔) – Fly over the sea
• Kai (海) – Sea, ocean
• Kaisei (海成) – Sea and success
• Kaiya (海也) – One connected to the sea
• Kairi (海里) – Sea village, ocean distance
• Kaito (海斗) – Big Dipper over the sea
• Minato (湊) – Harbor, safe port
• Nagisa (渚) – Seashore, beach
• Umito (海翔) – Flying over the sea
• Uminori (海則) – Law of the sea
• Uminobu (海信) – Faithful sea
• Kainosuke (海之介) – Helper of the sea
• Kaima (海真) – True sea
• Kaichi (海智) – Wise sea
• Kaito (海人) – Sea person, fisherman
• Kaira (海良) – Good sea
• Kaoru (海音) – Sound of the sea (modern reading)
• Kaisei (海星) – Sea star
• Kairyu (海龍) – Sea dragon
• Shion (潮音) – Sound of the tide
• Shio (潮) – Tide
• Shioto (潮翔) – Flying tide
• Namito (波翔) – Flying wave
• Namio (波雄) – Hero of the waves
• Namiki (波希) – Hope of the waves
• Harumi (陽海) – Sun over the sea
• Haruto (晴海) – Clear sea
• Seito (清海) – Pure sea
• Seiya (青海) – Blue sea
• Aomi (青海) – Blue ocean
• Aoto (蒼翔) – Fly across the blue sea
• Aoki (青輝) – Blue brightness by the sea
• Soraumi (空海) – Sky and sea
• Sorao (空央) – Open sky above the sea
• Riku (陸) – Land beside the sea
• Rikuto (陸翔) – Flying from the shore
• Isamu (勇海) – Brave sea
• Masumi (真海) – True sea
• Takumi (拓海) – Open sea, expand across the sea
• Hiromi (広海) – Wide sea
• Yūmi (優海) – Gentle sea
• Tomi (富海) – Rich sea
• Yoshiumi (義海) – Righteous sea
• Naomi (直海) – Honest sea
• Kanata (海向) – Toward the sea
• Umihiko (海彦) – Prince of the sea
• Umisuke (海介) – Helper of the sea
• Kaishin (海心) – Heart of the sea
• Seikai (青海) – Blue sea

Female Japanese Names That Mean Sea

Female Japanese Names That Mean Sea are usually linked to beauty, peace, and gentle waves. I like how many of these names have soft sounds while still carrying meaningful ties to the sea.

• Umi (海) – Sea, ocean
• Umiko (海子) – Child of the sea
• Umika (海花) – Sea flower
• Umine (海音) – Sound of the sea
• Umina (海菜) – Sea greens
• Umika (海香) – Sea fragrance
• Umiyo (海代) – Generation of the sea
• Umiri (海莉) – Sea jasmine
• Umino (海乃) – Of the sea
• Umina (海奈) – Grace of the sea
• Nagisa (渚) – Seashore, beach
• Nagisaki (渚咲) – Seashore blossom
• Nagimi (渚美) – Beautiful shore
• Nagino (渚乃) – Of the shore
• Minato (湊) – Harbor, safe port
• Minami (美波) – Beautiful wave
• Minase (水瀬) – Water rapids, stream by the sea
• Nami (波) – Wave
• Namika (波花) – Wave flower
• Namiko (波子) – Child of the waves
• Namine (波音) – Sound of the waves
• Namiri (波莉) – Wave jasmine
• Namina (波奈) – Graceful wave
• Namiyo (波代) – Generation of the waves
• Shiori (潮里) – Village by the tide
• Shion (潮音) – Sound of the tide
• Shioka (潮花) – Tide flower
• Shiomi (潮美) – Beautiful tide
• Shiona (潮奈) – Graceful tide
• Shiho (汐帆) – Tide and sail
• Kai (海) – Sea, ocean
• Kaimi (海美) – Beautiful sea
• Kaika (海花) – Sea flower
• Kairi (海莉) – Sea jasmine
• Kaine (海音) – Sound of the sea
• Aomi (青海) – Blue sea
• Aonami (青波) – Blue wave
• Aoka (青花) – Blue sea flower
• Harumi (春海) – Spring sea
• Haruka (遥海) – Distant sea
• Seami (清海) – Pure sea
• Seina (星海) – Starry sea
• Misaki (岬) – Cape by the sea
• Mio (澪) – Water channel, sea route
• Marina (真里奈) – Village by the sea (Japanese-style name)
• Sorami (空海) – Sky and sea
• Umeka (海恵花) – Blessed sea flower (creative combination)
• Umisora (海空) – Sea and sky (creative combination)
• Kaori (海織) – Weaving the sea (creative combination)
• Umihime (海姫) – Princess of the sea (creative combination)

Japanese Names That Mean Blue Sea

Japanese Names That Mean Blue Sea are inspired by clear water, bright skies, and peaceful ocean views. These names often symbolize hope, freedom, and natural beauty.

• Aomi (青海) – Blue sea
• Seikai (青海) – Blue ocean
• Aonami (青波) – Blue wave
• Aosora (蒼空) – Deep blue sky over the sea
• Aoto (蒼翔) – Flying over the blue sea
• Kai (海) – Sea, ocean
• Umi (海) – Sea, ocean
• Kaito (海翔) – Flying over the sea
• Kaisei (海青) – Blue sea (creative)
• Aoka (青花) – Blue sea flower (creative)
• Aomiya (青海也) – One of the blue sea (creative)
• Seina (青海奈) – Blue sea grace (creative)
• Seimi (青海美) – Beautiful blue sea (creative)
• Kaimi (海美) – Beautiful sea
• Umika (海花) – Sea flower
• Umino (海乃) – Of the sea
• Kairi (海莉) – Sea jasmine
• Kaine (海音) – Sound of the sea
• Namika (波花) – Wave flower
• Namine (波音) – Sound of the waves
• Minami (美波) – Beautiful wave
• Mio (澪) – Water channel leading to the sea
• Nagisa (渚) – Seashore
• Misaki (岬) – Cape by the sea
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Shiho (汐帆) – Tide and sail
• Harumi (春海) – Spring sea
• Hiromi (広海) – Wide sea
• Masumi (真海) – True sea
• Naomi (直海) – Honest sea
• Takumi (拓海) – Open sea
• Yūmi (優海) – Gentle sea
• Aoshio (青潮) – Blue tide (creative)
• Aonagi (青凪) – Calm blue sea (creative)
• Seiran (青藍) – Blue indigo sea (creative)
• Seika (青華) – Blue blossom by the sea (creative)
• Seino (青乃) – Of the blue (creative)
• Aorika (青里花) – Blue coastal flower (creative)
• Umisora (海空) – Sea and sky (creative)
• Sorami (空海) – Sky and sea (creative)
• Umikaori (海香) – Sea fragrance
• Umine (海音) – Sound of the sea
• Kaiha (海波) – Sea waves (creative)
• Aoharu (青晴) – Blue clear weather (creative)
• Seito (青翔) – Flying through blue skies (creative)
• Aoha (青葉) – Blue-green leaves by the sea
• Aonoe (青乃恵) – Blessing of the blue (creative)
• Aomina (青美奈) – Beautiful blue sea (creative)
• Seiumi (青海) – Blue sea (creative reading)

Japanese Names That Mean Calm Sea

Japanese Names That Mean Calm Sea reflect quiet waters, balance, and inner peace. They are a thoughtful choice for anyone who loves names with a gentle and relaxing meaning.

• Nagi (凪) – Calm sea, calm wind
• Nagisa (渚) – Calm seashore
• Nagimi (凪美) – Beautiful calm sea (creative)
• Nagina (凪奈) – Peaceful calm sea (creative)
• Nagika (凪花) – Calm sea flower (creative)
• Nagine (凪音) – Sound of a calm sea (creative)
• Nagino (凪乃) – Of the calm sea (creative)
• Nagiri (凪莉) – Calm sea jasmine (creative)
• Umi (海) – Sea, ocean
• Umika (海花) – Sea flower
• Umine (海音) – Sound of the sea
• Umino (海乃) – Of the sea
• Umina (海奈) – Grace of the sea
• Kaimi (海美) – Beautiful sea
• Kai (海) – Sea
• Harumi (春海) – Spring sea
• Seami (清海) – Pure, calm sea
• Seikai (静海) – Quiet sea (creative)
• Shizumi (静海) – Peaceful sea (creative reading)
• Shizuka (静香) – Quiet and peaceful
• Minato (湊) – Harbor, safe port
• Mio (澪) – Calm water channel
• Misaki (岬) – Cape by the sea
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Shiho (汐帆) – Tide and sail
• Minami (美波) – Beautiful wave
• Namine (波音) – Sound of the waves
• Namika (波花) – Wave flower
• Namiko (波子) – Child of the waves
• Aomi (青海) – Blue sea
• Aonagi (青凪) – Calm blue sea (creative)
• Seinagi (静凪) – Quiet calm sea (creative)
• Umisora (海空) – Sea and sky (creative)
• Sorami (空海) – Sky and sea (creative)
• Naomi (直海) – Honest sea
• Masumi (真海) – True sea
• Takumi (拓海) – Open sea
• Hiromi (広海) – Wide sea
• Yūmi (優海) – Gentle sea
• Seina (清奈) – Pure and peaceful
• Seika (清花) – Pure flower by the sea (creative)
• Kiyomi (清海) – Pure sea (creative reading)
• Nagiharu (凪春) – Calm spring sea (creative)
• Nagitsuki (凪月) – Calm sea under the moon (creative)
• Nagihoshi (凪星) – Calm sea with stars (creative)
• Nagikaori (凪香) – Fragrance of the calm sea (creative)
• Umikaori (海香) – Sea fragrance
• Seiran (静藍) – Quiet blue sea (creative)
• Nagiyori (凪依) – One who brings calm like the sea (creative)

Japanese Names That Mean Deep Sea

Japanese Names That Mean Deep Sea often symbolize wisdom, mystery, and hidden strength. These names are inspired by the vast ocean and the many secrets beneath its surface.

• Shinkai (深海) – Deep sea
• Fukami (深海) – Deep sea (creative reading)
• Kai (海) – Sea, ocean
• Umi (海) – Sea, ocean
• Kaito (海翔) – Flying over the sea
• Kaisei (海成) – Sea and growth
• Kairi (海里) – Sea village, ocean distance
• Umika (海花) – Sea flower
• Umine (海音) – Sound of the sea
• Umino (海乃) – Of the sea
• Kaimi (海美) – Beautiful sea
• Harumi (春海) – Spring sea
• Masumi (真海) – True sea
• Naomi (直海) – Honest sea
• Hiromi (広海) – Wide sea
• Takumi (拓海) – Open sea
• Yūmi (優海) – Gentle sea
• Minato (湊) – Harbor, safe port
• Nagisa (渚) – Seashore
• Mio (澪) – Water channel to the sea
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Namine (波音) – Sound of the waves
• Namika (波花) – Wave flower
• Aomi (青海) – Blue sea
• Seikai (青海) – Blue ocean
• Shinka (深海) – Deep ocean (creative)
• Shinkaiya (深海也) – One of the deep sea (creative)
• Shinkane (深海音) – Sound of the deep sea (creative)
• Shinkami (深海美) – Beautiful deep sea (creative)
• Fukakai (深海) – Profound sea (creative)
• Fukamiya (深海也) – Deep sea companion (creative)
• Fukane (深音) – Deep sound like the sea (creative)
• Umisora (海空) – Sea and sky (creative)
• Sorami (空海) – Sky and sea (creative)
• Kaiha (海波) – Sea waves (creative)
• Kaishin (海深) – Deep sea (creative)
• Umishin (海深) – Sea depth (creative)
• Shinumi (深海美) – Beautiful deep sea (creative)
• Shinkaori (深海香) – Fragrance of the deep sea (creative)
• Shinkatsuki (深海月) – Moon over the deep sea (creative)
• Shinkahoshi (深海星) – Star of the deep sea (creative)
• Shinkanagi (深海凪) – Calm deep sea (creative)
• Fukashio (深潮) – Deep tide (creative)
• Fukunami (深波) – Deep waves (creative)
• Fukamio (深澪) – Deep sea channel (creative)
• Kaihiro (海宏) – Vast sea (creative)
• Shinharu (深春) – Deep spring sea (creative)
• Umihiro (海広) – Wide open sea (creative)
• Shinkaira (深海良) – Good fortune from the deep sea (creative)

Japanese Names That Mean Sea Waves

Japanese Names That Mean Sea Waves are connected with movement, energy, and change. They remind us that, like the waves, life keeps moving forward through every challenge.

• Nami (波) – Wave
• Namiko (波子) – Child of the waves
• Namika (波花) – Wave flower
• Namine (波音) – Sound of the waves
• Namina (波奈) – Graceful wave
• Namiri (波莉) – Wave jasmine (creative)
• Namiyo (波代) – Generation of waves (creative)
• Namino (波乃) – Of the waves (creative)
• Namikaori (波香) – Fragrance of the waves (creative)
• Namitsuki (波月) – Moon over the waves (creative)
• Namihoshi (波星) – Star above the waves (creative)
• Namiharu (波春) – Spring waves (creative)
• Namisora (波空) – Waves and sky (creative)
• Namiumi (波海) – Sea waves (creative)
• Kaiha (海波) – Ocean waves (creative)
• Umiha (海波) – Sea wave (creative)
• Umi (海) – Sea, ocean
• Kai (海) – Sea
• Kaito (海翔) – Flying over the sea
• Kairi (海里) – Sea village, ocean distance
• Kaisei (海成) – Sea and growth
• Umika (海花) – Sea flower
• Umine (海音) – Sound of the sea
• Kaine (海音) – Sound of the ocean
• Minami (美波) – Beautiful wave
• Nagisa (渚) – Seashore
• Mio (澪) – Waterway leading to the sea
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Shiho (汐帆) – Tide and sail
• Aonami (青波) – Blue waves
• Aomi (青海) – Blue sea
• Seinami (清波) – Pure waves (creative)
• Harunami (春波) – Spring waves
• Kazenami (風波) – Wind-driven waves (creative)
• Yūnami (夕波) – Evening waves
• Asanami (朝波) – Morning waves
• Shiranami (白波) – White waves
• Ayanami (綾波) – Patterned waves
• Isonami (磯波) – Shore waves
• Hamanami (浜波) – Beach waves (creative)
• Seinaha (青波) – Blue ocean waves (creative reading)
• Umishio (海潮) – Sea tide (creative)
• Namisei (波星) – Wave star (creative)
• Namikae (波恵) – Blessed waves (creative)
• Namiyori (波依) – One who follows the waves (creative)
• Namihime (波姫) – Princess of the waves (creative)
• Namimori (波守) – Guardian of the waves (creative)
• Namiteru (波輝) – Shining waves (creative)
• Namisaki (波咲) – Waves in bloom (creative)

Japanese Names That Mean Sea Breeze

Japanese Names That Mean Sea Breeze bring to mind fresh air, cool winds, and peaceful days by the coast. These names have a light, refreshing feeling that many people enjoy.

• Umikaze (海風) – Sea breeze (creative)
• Kaikaze (海風) – Ocean breeze (creative)
• Kazumi (風海) – Sea wind (creative)
• Kazeka (風花) – Wind flower
• Kazune (風音) – Sound of the wind
• Kazuto (風翔) – Flying with the wind
• Kazuki (風希) – Hope carried by the wind
• Kazeha (風葉) – Wind through the leaves
• Kazumi (和美) – Peaceful beauty (traditional name)
• Umine (海音) – Sound of the sea
• Umika (海花) – Sea flower
• Umi (海) – Sea, ocean
• Kai (海) – Sea
• Kaito (海翔) – Flying over the sea
• Kairi (海莉) – Sea jasmine
• Kaimi (海美) – Beautiful sea
• Harumi (春海) – Spring sea
• Naomi (直海) – Honest sea
• Masumi (真海) – True sea
• Hiromi (広海) – Wide sea
• Takumi (拓海) – Open sea
• Yūmi (優海) – Gentle sea
• Nagisa (渚) – Seashore
• Minato (湊) – Harbor
• Mio (澪) – Sea channel
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Shiho (汐帆) – Tide and sail
• Namine (波音) – Sound of the waves
• Namika (波花) – Wave flower
• Minami (美波) – Beautiful wave
• Aonami (青波) – Blue waves
• Aomi (青海) – Blue sea
• Umikazeha (海風葉) – Leaf in the sea breeze (creative)
• Umikazune (海風音) – Sound of the sea breeze (creative)
• Kaikazeha (海風花) – Sea breeze flower (creative)
• Kazesora (風空) – Wind and sky (creative)
• Kazenami (風波) – Wind and waves
• Kazeharu (風春) – Spring breeze
• Kazetsuki (風月) – Wind and moon
• Kazehoshi (風星) – Wind and stars
• Umisora (海空) – Sea and sky (creative)
• Sorami (空海) – Sky and sea (creative)
• Kaishio (海潮) – Sea tide (creative)
• Umikaori (海香) – Fragrance of the sea
• Kazeyori (風依) – Guided by the wind (creative)
• Umiharu (海春) – Spring sea (creative)
• Kazenagi (風凪) – Calm sea breeze (creative)
• Uminagi (海凪) – Calm sea (creative)
• Kazemori (風守) – Guardian of the sea breeze (creative)

Japanese Names That Mean Coral Sea

Japanese Names That Mean Coral Sea are inspired by colorful reefs, sea life, and the beauty of the underwater world. They are a lovely choice for names connected with nature and the ocean.

• Sango (珊瑚) – Coral
• Sangoka (珊瑚花) – Coral flower (creative)
• Sangomi (珊瑚美) – Beautiful coral (creative)
• Sangone (珊瑚音) – Sound of the coral sea (creative)
• Sangona (珊瑚奈) – Graceful coral (creative)
• Sangori (珊瑚莉) – Coral jasmine (creative)
• Sangono (珊瑚乃) – Of the coral (creative)
• Sangokaori (珊瑚香) – Coral fragrance (creative)
• Sangotsuki (珊瑚月) – Coral moon (creative)
• Sangohoshi (珊瑚星) – Coral star (creative)
• Sangoumi (珊瑚海) – Coral sea (creative)
• Kai (海) – Sea, ocean
• Umi (海) – Sea, ocean
• Umika (海花) – Sea flower
• Umine (海音) – Sound of the sea
• Umino (海乃) – Of the sea
• Kaimi (海美) – Beautiful sea
• Kairi (海莉) – Sea jasmine
• Kaito (海翔) – Flying over the sea
• Kaisei (海成) – Sea and growth
• Harumi (春海) – Spring sea
• Masumi (真海) – True sea
• Naomi (直海) – Honest sea
• Hiromi (広海) – Wide sea
• Takumi (拓海) – Open sea
• Yūmi (優海) – Gentle sea
• Nagisa (渚) – Seashore
• Minato (湊) – Harbor
• Mio (澪) – Sea channel
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Shiho (汐帆) – Tide and sail
• Nami (波) – Wave
• Namika (波花) – Wave flower
• Namine (波音) – Sound of the waves
• Minami (美波) – Beautiful wave
• Aomi (青海) – Blue sea
• Aonami (青波) – Blue waves
• Sangonami (珊瑚波) – Coral waves (creative)
• Sangoshio (珊瑚潮) – Coral tide (creative)
• Sangokaze (珊瑚風) – Coral sea breeze (creative)
• Sangosora (珊瑚空) – Coral sea and sky (creative)
• Sangonagi (珊瑚凪) – Calm coral sea (creative)
• Sangoharu (珊瑚春) – Spring coral sea (creative)
• Sangomori (珊瑚守) – Guardian of the coral sea (creative)
• Sangohime (珊瑚姫) – Coral princess (creative)
• Sangoteru (珊瑚輝) – Shining coral (creative)
• Sangoyori (珊瑚依) – One guided by coral (creative)
• Sangosei (珊瑚星) – Coral star (creative)
• Sangokae (珊瑚恵) – Blessed coral (creative)

Japanese Names That Mean Stormy Sea

Japanese Names That Mean Stormy Sea represent courage, determination, and the strength to face difficult times. These names reflect the powerful side of the sea while still showing resilience and hope.

• Arashi (嵐) – Storm
• Arashiumi (嵐海) – Stormy sea (creative)
• Arashinami (嵐波) – Storm waves (creative)
• Arashishio (嵐潮) – Storm tide (creative)
• Arashikaze (嵐風) – Storm wind (creative)
• Arashika (嵐花) – Storm flower (creative)
• Arashine (嵐音) – Sound of the storm (creative)
• Arashimi (嵐美) – Beautiful storm (creative)
• Arashino (嵐乃) – Of the storm (creative)
• Arashiri (嵐莉) – Storm jasmine (creative)
• Kai (海) – Sea, ocean
• Umi (海) – Sea, ocean
• Kaito (海翔) – Flying over the sea
• Kaisei (海成) – Sea and growth
• Kairi (海莉) – Sea jasmine
• Kaimi (海美) – Beautiful sea
• Umika (海花) – Sea flower
• Umine (海音) – Sound of the sea
• Harumi (春海) – Spring sea
• Masumi (真海) – True sea
• Naomi (直海) – Honest sea
• Takumi (拓海) – Open sea
• Hiromi (広海) – Wide sea
• Yūmi (優海) – Gentle sea
• Nagisa (渚) – Seashore
• Minato (湊) – Harbor
• Mio (澪) – Sea channel
• Nami (波) – Wave
• Namika (波花) – Wave flower
• Namine (波音) – Sound of the waves
• Minami (美波) – Beautiful wave
• Shion (潮音) – Sound of the tide
• Shiomi (潮美) – Beautiful tide
• Shiho (汐帆) – Tide and sail
• Aonami (青波) – Blue waves
• Aomi (青海) – Blue sea
• Ran (嵐) – Storm
• Arashitsuki (嵐月) – Storm moon (creative)
• Arashihoshi (嵐星) – Storm star (creative)
• Arashisora (嵐空) – Stormy sky (creative)
• Arashimori (嵐守) – Guardian of the storm (creative)
• Arashihime (嵐姫) – Storm princess (creative)
• Arashiteru (嵐輝) – Shining storm (creative)
• Arashiyori (嵐依) – Guided by the storm (creative)
• Kaifuu (海風) – Sea wind
• Kainami (海波) – Sea waves (creative)
• Kaishio (海潮) – Sea tide (creative)
• Arashikai (嵐海) – Storm ocean (creative)
• Shippuu (疾風) – Strong gale, swift wind
• Reppuu (烈風) – Fierce wind

Tips For Choosing An Authentic Japanese Sea Name

If you are selecting a Japanese name, keep these tips in mind: 

• Check the meaning of every kanji. 
• Make sure the reading is correct. 
• Choose names that are used naturally in Japanese. 
• Avoid creating names by combining random kanji. 
• Think about the cultural meaning as well as the translation. 

Taking time to understand a name helps you choose one that feels authentic and respectful. 

FAQs on Japanese Names That Mean Sea