海藻で 海も人も すこやかに

いま「海藻」は、サステナブルでヘルシーな食材として世界中から注目を集めています。世界銀行の報告(※1)では、食利用にとどまらず肥料・飼料やバイオプラスチック等の可能性も含め、2030年までに最大1.7兆円規模の市場に成長すると予測されています。

日本は1,500種類以上の海藻が生息し、50種類以上を食してきた世界有数の海藻文化を持つ国です。しかし近年、環境変化により天然・養殖ともに生産量の激減に加え、国内の1人あたり消費量も過去30年で約50%減少(※2)するなど、文化と産業が途絶える危機に直面しています。

この現状を変え、海の可能性を切り拓くために合同会社シーベジタブルは活動しています。 私たちは、激減する海藻の種苗生産に関する基礎研究から行い、「陸上栽培」と「海面栽培」における量産化の技術を確立。新たな加工法や食べ方の開発、飲食体験事業までを一貫して取り組んでいます。

海面栽培に小魚が集まってきている様子
※1 世界銀行「Global Seaweed New and Emerging Markets Report 2023」(2023年8月発表)より
※2 農林水産省「食料需給表」をもとに算出

私たちはこれらの技術を核に、
大きく4つの事業を展開しています。

◼︎生産・加工・販売 種苗生産から食卓にのぼる料理開発までを一貫して取り組むことで、今までにない美味しい海藻を届ける

◼︎研究開発・実証研究・調査研究 これまで存在しなかった海藻の種苗生産や量産技術を確立し、その生態系への効果を調査データで裏付けることで、企業や地域の未来に貢献する

◼︎飲食体験 海藻の新たな美味しさを飲食体験としてひらき、食文化を育む人の輪を広げる

◼︎新規事業開発・協業 海藻食文化のさらなる発展に加え、食以外の可能性も探求するため、多分野の企業との協業を推進する

シーベジタブルの事業紹介イメージ

「海藻を食べる」という
日常の循環へ

採れなくなった海藻を栽培できる技術を生み出すことで、美味しい海藻を食べ続けられるようにする。そして、地域に新しい産業や生業を生み出し、海の生態系回復(ネイチャーポジティブ)につなげていく。これを持続可能な形で実現するためには、一時的な取り組みで終わらせず、社会全体で海藻の消費を促す「新しい食文化」を育んでいくことが不可欠です。

私たちが目指すのは、「海藻を食べる」という日常の行為を通じて、4つの価値が共に芽生える社会です。さらに今後は、食の枠を超えた領域へと、その可能性を広げていきます。

⚫︎人の健康をつくる
⚫︎食文化をつなぎ、新しい食文化をつくる
⚫︎地域の産業・生業をつくる
⚫︎海の生態系を回復させる

過去から受け継がれてきた海藻食文化を守るだけでなく、未知なる美味しさを提案し、現代の食卓へ。美味しい海藻を育て、多くの人に届け、技術を社会へ還元していくことで、海も人もすこやかな未来を、皆さんと共につくっていきます。

海藻料理を楽しむ食卓シーン

organizational structure

Co-representative

Jun Hachiya (photo right)

Born in Okayama Prefecture. During his university years, he developed a business plan for “Combined aquaculture of abalone and seaweed using deep ocean water” and conducted research to commercialise it. After that, co-founded SEA VEGETABLE COMPANY with Tomohiro, specialising in seaweed production. Hachiya is tackling these environmental issues alongside production teams–cultivating seaweed seedlings to develop both land- and sea-based cultivation methods–to regenerate the abundant ocean by restoring seaweed populations across Japan.

Yuichi Tomohiro (left photo)

Born in Osaka. After graduating from university, he went on a field trip visiting farms, mountains, and fishing villages to learn about the current state of the regions. After the 2011 Great East Japan Earthquake, he worked with women from fishing families on the Oshika Peninsula in Ishinomaki City, Miyagi, to launch businesses such as bento shops and accessory brands, as well as a market in Tokyo's Sumida Ward that connects people who eat with those who make products. Afterwards, Tomohiro co-founded SEA VEGETABLE COMPANY with Hachiya. He strives to create a new seaweed culinary culture through connecting people and organisations.

Co-representative photo
japan map

Areas we are working on

Sea Vegetableis cultivating seaweed on land and in the sea at more than 30 locations nationwide. (Including test stage)

Kochi, Mie, Ehime, Kumamoto, Akita, Shizuoka, Kumamoto, Yamaguchi, Hokkaido, Okinawa, etc.

History

2016
Establishment of SEA VEGETABLE COMPANY in Kochi Prefecture 
Succeeded in the world's first land-based cultivation of Aonori using underground seawater
2020
Developing onshore production bases across the country, including Kumamoto, Mie, and Ehime prefectures
Started research and production tests on seaweed offshore cultivation.
Shogo Arai, director of the Seaweed Research Institute, joins
Opened an Online Store and started selling retail products
Obtained patents related to in-house-developed production equipment and subsequently obtained multiple additional patents.
2021
Chef, Shui Ishizaka has joined, and SEA VEGETABLE Test Kitchen opened in Tokyo.
Daisuke Okada, who was a sushi chef at a referral-only sushi restaurant, Sumeshiya, joined as a partner chef/seaweed culinary expert.
2023
Made a debut at Isetan Shinjuku store〈Salon du chocolat> for the first time. Offered Seaweed x Cacao dessert (will also open in 2024)
2024
Hosted “EAT & MEET SEA VEGETABLE” at Isetan Shinjuku store and Nihonbashi Mitsukoshi main store
Succeeded the world's first successful mass production of Kuronori seaweed (over 100 kg dry weight) on land.
Signed a joint demonstration agreement with Panasonic HD to explore the possibility of solving social issues through seaweed cultivation
2025
Creates a sustainable seaweed industry together by collaborating with companies across industries. SEA VEGETABLE Co Creation Project launched
A new sweets experience born from the sea "umika” series started
Succeeded in mass production of Kuronori seaweed in land cultivation (dry weight over 300kg)

2026
"SEAVEGE- Stand" and “SEAVEGE- Kitchen Lab" open in the Yaesu/Nihonbashi area of Tokyo.

Awards/selection history

2024
Ministry of Economy, Trade and Industry," J-Startup WEST
ICC FUKUOKA 2024 “Food & Drink Award”won the Grand Prix, and won awards in other categories as well.
Osaka/Kansai Expo Signature Pavilion "EARTH MART”, EARTH FOODS Shui Ishizaka selected as a chef who cooks 25

2025
Aonori shoyu won "Innovation of the Year Award" at the Future Awards 2025 organized by We’re Smart, Belgium
SEA VEGETABLE's Co-Representatives were selected to Forbes JAPAN × EARTH MART "25 people who will brighten the future of food”
"WIRED Innovation Award 2025”organized by WIRED JAPAN and supported by Sekisui House,
Grand Prize (SME Agency Director-General's Award) and Japan New Business Conference Federation Chairman's Award, 20th “ Nippon New Business Creation Awards”
Jury Special Award, “2025 NIKKEI Blue Ocean Awards”

Media coverage

SEA VEGETABLE CYCLE
(シーベジタブルサイクル)

2026年10月から2027年春までの期間、百貨店、デベロッパー、飲食店、流通、料理人など多様なパートナーと連携し、海藻を「食べる」ことを起点に、海や食文化、地域の豊かな巡りを社会全体へ広げていく共創プロジェクトです。

SEA VEGETABLE CYCLEについて詳しく知る

Company name: SEA VEGETABLE COMPANY

Founding year: 2016

Co-representative: Jun Hachiya, Yuichi Tomohiro

Counselor: Ryutaro Yamamoto

Advisor tax accountant: Hajime Mukaiya

Business details: Seaweed research, production, processing, sales, eating and drinking, etc.

Head office location: 688-9 Anauchi Otsu, Aki City, Kochi Prefecture

Areas where we are working onshore: Kochi, Mie, Ehime, Kumamoto, Iwate, etc.

Areas where we are working on offshore: Hokkaido, Akita, Shizuoka, Mie, Ehime, Yamaguchi, Kumamoto, etc.

SEAVEGE- Kitchen Lab: Tokyo

*Patent acquired for production equipment developed in-house