About Marine House SEASIR

About us

SEASIR started as a diving shop on Aka island in 1983.
Since then, SEASIR has grown into the largest Okinawan diving company existing to this day.

In Okinawa, we operate 4 diving and marine activity shops, a diving equipment store, an overhaul center, a hostel, and a pension, as well as a travel agency.
In 2019, we also opened a diving shop in Cebu, in the Philippines.

Our company vision is to be a gateway for anybody to discover the wonders of Nature
and to inspire them with the drive to protect this exceptional heritage that is the sea.

Company information

Company nameSEASIR Ltd
CEO Hideshi INAI
Capital JPY 48,000,000
Our business・Leisure diving services
・Diving instructor education
・Diving equipment wholesales & retails
・Diving equipment development
・Food service(Aka island)
・Accommodation(Aka island, Naha)
・Travel agency

Head office

Adress 2-2-2, Minato-machi, Naha. Okinawa 900-0001
Tel +81 (0)98-941-2715 (Head office)

Our history

  • 1983/07

    Our first diving shop opened on Aka island.

  • 1997/02

    SEASIR NAHA opened in Naha city.

  • 1998/03

    SEASIR MIHAMA opened in Chatan. The shop was equipped with its own diving pool and equipment shop.

  • 1999/05

    Opening of our subsidiary company “Marine club berry” at Kanucha.

  • 2000/05

    Opening of the Marine Club Berry Kise.

  • 2002/03

    Launch of “LOVE”, our largest diving cruiser.

  • 2002/09

    SEASIR became a joint-stock company.

  • 2005/04

    Opening of our hotel at SEASIR AKA.

  • 2008/08

    Launch of our Premium Brand, Dive&CRUISE “La mer riche”.

  • 2011/12

    SEASIR MIHAMA closed.
    The shop reopened as the “Uminchu shoten” equipment store in Naha.

  • 2012/05

    Opening of the Marine Club Berry Naha.

  • 2014/07

    Our “LINE” diving cruiser sets sails for the first time.
    Launch of half-day tours.

  • 2015/01

    Start of “SEASIR travel”, our online travel agent for foreign travelers.

  • 2015/07

    Opening of “MyPlace”, our guesthouse located in Naha.

  • 2016/03

    SEASIR ranked in the top 100 companies promoting diversity.

  • 2016/08

    Inauguration of “LAGOON”, our third diving cruiser.

  • 2017/02

    The head office and our Uminchu store relocated in front of SEASIR NAHA.

  • 2017/04

    Opening of SEASIR CEBU in the Philippines.

  • 2020/04

    Start of our parasailing tours in Naha.

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