Living in Harmony with Nature

Reef Conservation Activities

Casio Coral Field

In collaboration with various environmental protection groups, Casio has been promoting its “Love The Sea And The Earth” project to support the activities of the groups. In 2018, Casio began providing support for Aqua Planet, an NPO that preserves coral, which is chaired by actress Ritsuko Tanaka. In January, the Casio coral field was established in the seas of Ishigaki, Okinawa Prefecture, and 200 coral “seedlings” were planted with the objective for them to reproduce in three years’ time. Casio carried out this activity as an official supporter of the International Year of the Reef 2018 appointed by the Ministry of the Environment.

Logo: Love The Sea And The Earth and Aqua Planet
Logo: International Year of the Reef 2018
Image: The Casio coral field lies

The Casio coral field lies to the south of Ishigakijima island, Okinawa Prefecture in shallow seas about 4 meters deep at high tide. The coral coexists with a phytoplankton called zooxanthella, and 200 coral seedlings from more than seven resilient varieties, including Acropora Copiosa Nemenzo in the genus Acropora of the family Acroporidae, were planted.

These coral seedlings were ones that had been newly collected with permission and divided seedlings cultivated in other coral fields.

Progress report on coral field

January 21, 2018: coral planting started
Photo: coral planting started
Photo: coral planting started
Photo: coral planting started
Coral seedlings are secured with stainless steel wire to Magwhite foundations. Compared to gypsum and cement, Magwhite is slightly alkaline, so seems suited to growing coral.
January 28, 2018: coral planting completed
Photo: coral planting completed
Photo: coral planting completed
Photo: coral planting completed
The Casio coral field was completed by attaching the 200 coral seedlings to posts standing about 35cm apart.
February 18, 2018 status
Situation photo of 2018/2/18
Situation photo of 2018/2/18
Situation photo of 2018/2/18
Situation photo of 2018/2/18
Situation photo of 2018/2/18
Situation photo of 2018/2/18
With a water temperature of 22.6°C, no significant changes has been observed in the coral.
March 7, 2018 status
Situation photo of 2018/3/7

With a water temperature of 23.6°C, no major changes compared with February could be observed in the coral at a glance, but, looking carefully, the soft body of the coral had begun to cover the stainless steel wire. It was confirmed that the coral was steadily becoming established.

Situation photo of 2018/3/7
Situation photo of 2018/3/7
Situation photo of 2018/3/7
April 14, 2018 status
Situation photo of 2018/4/14
Situation photo of 2018/4/14
Water temperature of 25.4°C. Around this time, an extremely large amount of seaweed was present, so removal of seaweed was carried out. The left photograph shows before removal of seaweed and the right photograph shows after removal of seaweed.
Situation photo of 2018/3/7
Situation photo of 2018/3/7
Situation photo of 2018/3/7
The wire has been completely assimilated and can no longer be seen. It was also confirmed that the coral had adhered to the Magwhite foundation.
Situation photo of 2018/3/7
Situation photo of 2018/3/7
Situation photo of 2018/3/7
Situation photo of 2018/3/7
Situation photo of 2018/3/7

Photographs supplied by Aqua Planet