[Geological Survey of Japan,  Top page]

[Institute of Geology and Geoinformation, Top page]

Makoto Saito, Ph.D  Innovation Coordinator, Geological Survey of Japan, AIST

Geologist (Regional geology)

Research Field of Interest:

Accretionary complex in Japan

Geological evolution of Kyushu Island

NEWFossil chocolate, museum goods with interesting geologic stories (Makoto Saito, Seiichi Toshimitsu, Rie Morijiri), 34th International Geological Congress (IGC) Australia 2012.

The advanced geological researches and fundamental national land information. [Synthesiology vol.3, no.1, p. 13-25 (2010)(PDF DOWNLOAD )]

Rapid evolution of the Eocene accretionary complex (Hyuga Group) of the Shimanto terrane in southeastern Kyushu, southwestern Japan. Island Arc 17 (2) , 242–260.(2007)

Geological Sheet Maps surveyed by me:

1:50,000 with English explanation


Sutheastern Kyushu Island, Cretaceous to earliest Miocene accretionary complex and Late Pleistocene pyroclastic flow deposit.


Central Kyushu Island, Jurassic to Paleogene accretionary complex, Miocene granite.


Central Honshu Island, Jurassic accretionary complex and Cretaceous granite.


Central Kyushu Island, Jurassic accretionary complex of Chichibu terrane "Kurosegawa complex", Higo metamorphic rocks, etc.

1:200,000 with English abstract except for Miyazaki


Sutheastern Kyushu Island

Cretaceous to earliest Miocene accretionary complex, Miocene to Pliocene forearc sediment and Late Pleistocene pyroclastic flow deposit


Suthern margin of Kyushu Island and northern part of Tanegashima Island.

Cretaceous to earliest Miocene accretionary complex, Late Cretaceous forearc sediment and Pleistocene pyroclastic flow deposits and Pleistocene to Holocene volcano.

Yaku Shima

Kuchinoerabu Jima Island (active volcano), Yaku Shima Island (world heritage, Eocene accretionarycomplex and Miocene granite) and southern part of Tanegashima Island (Paleogene accretionary complex and Neogene to Quarternary sediments).

Nakanoshima and Takara Jima 

Nakanoshima and Takara Jima and other islands belong to Tokara Retto (Islands) and sit on the present volcanic front of the Ryukyu arc. Only Sandon Iwa (Rocks) belongs to the Cretaceous accretionary complex.( Bull. Geol. Surv. Japan, vol.59 No.9/10 p.467-472 and cover page (2008))


This map includes Tokunoshima, Okinoerabu Jima, Iotori Shima Islands and Tonbara Iwa Rocks of the shore reef. Tokunoshima and Okinoerabu Jima Islands are composed of Cretaceous accretionary complexes intruded by Paleogene granitic rocks, which are covered by the Pleistocene Ryukyu Group, latest Pleistocene to Holocene pyroclastic flow deposits, and Holocene sediments. Iotori Shima is an active volcanic island sitting on the present volcanic front of the Ryukyu arc.

Yatsushiro and a part of Nomo Zaki

The Yatsushiro and a part of Nomo Zaki district is located in the western part of Kyushu Island. This district includes 1:50,000 Tomochi district mentioned above. The most strata, rocks and accretionary complexes in Japanese Islands are distributed over this area.This map shows a epitome of the Japanese Islands. The number of legend is 202.


Perchase guide for these Geological Sheet Maps