Field Trip Maps

Field Excursions in Japan


Shallow- to offshore-marine siliciclastic bio- and lithofacies changes in Cretaceous Yezo forearc basin, central Hokkaido
(Geology and stratigraphy of forearc basin deposits in Hakkaido, Japan)
  • Geologic Age : Mesozoic (Cretaceous)
  • Area : Yubari and Mikasa City, Hokkaido
  • Start and end : New Chitose Airport, Chitose, Hokkaido

Offshore mudstone facies in the Saku Formation including OEA2
(Cenomanian-Turonian boundary) horizon along the Hakkin River, Yubari

Shallow-marine storm-dominated sandstone facies characterized by hummocky cross-stratification along the Pombetsu River, Mikasa area

Giant Cretaceous ammonite collection from the Yezo Group in a local small museum, Mikasa City Museum


Back-arc Opening of the East Sea (Japan Sea) recorded in the Cenozoic Sequence in Northern Japan
  • Geologic Age : Cenozoic (Paleogene and Neogene)
  • Area : Yamagata or Akita or Aomori Prefecture in northern Honshu

An early Miocene volcanic and sedimentary sequence that records the opening history of the East Sea (Japan Sea), exposed at a cliffed coast in northern Japan.

An andesite lava that records large paleomagnetic rotation of northern Japan during the early Miocene major phase of the back-arc opening, exposed at a cliffed coast in northern Japan.


Cenozoic tectonics and sedimentation arc-arc collision zone in central Japan
  • Geologic Age : Cenozoic (Miocene, Pliocene and Pleistocene)
  • Area : The field trip will start from Niigata City and will end in Nagano City.

Turbidite and debris flow deposits in Niigata area.

Delta front and delta plain succession in Nagano.


A continuous marine succession across the Lower-Middle Pleistocene boundary and the vicinity along the Yoro River in the Boso Peninsula, central part of Japan
  • Geologic Age : Cenozoic (Quaternary)
  • Area : Ichihara City and Otaki Town, Chiba Prefecture, Japan

Location of the excursion stops shown on the schematic geologic map of the Kanto plane (after Nirei et al., 1987).

Location of the Chiba composite section and excursion stops shown on the geologic map of the Kazusa Group (after Mitsunashi et al., 1961; Ichikawa et al., 1971).

Lithofacies across the Lower-Middle Pleistocene boundary in the Tabuchi section (Kazaoka et al., 2015).
(a) Overview of the Tabuchi section. The yellow dashed line indicates the horizon. (b) and (c) Detail of the Byakubi-E (Byk-E) tephra. The length of rule (b) and diameter of the coin (c) are 1.25 m and 2 cm, respectively.


Fuji Volcano: Island-arc active basalt stratovolcano
  • Geologic Age : Cenozoic (Holocene)
  • Area : Yamanashi and Shizuoka Prefectures

Fuji Volcano and the Hoei Crater (right center) viwed from the SW foot.

The Holocene basalt lava flow forms a water fall at the WSW foot of Fuji Volcano.


Geological and historical evidence of paleotsunamis along Japan Trench and Nankai Trough
  • Geologic Age : Cenozoic (Quaternary)
  • Area : Miyagi and Shizuoka prefectures (arrive and depart from Haneda/Narita airports)

Paleotsunami record at Sendai Plain at Miyagi Prefecture.

The 1933 Showa-Sanriku tsunami monument at Miyagi Prefecture.

Paleotsunami record of the 1498 Meio tsunami at Shizuoka Prefecture (Photo: Osamu Fujiwara).


Geological disposal of radioactive waste
  • Period of the course :
    The trip has two options. One is to visit both sites to cover within 4days and the other is to visit only Mizunami URL (easy to access by flight from Korea via Chubu Central Airport) with two days trip.
    Both URLs, however, have a limit of visiting number to the gallery due to the shaft availability (up to 20 persons as maximum.)

Location map of off-site URL and laboratory for geological disposal of radioactive waste in Japan



Initiation and development of coral reefs in the Ryukyu Islands
  • Geologic Age : Cenozoic (Quaternary and Recent)
  • Area : Okinawa

Pleistocene carbonates formed in coral reefs and associated shelves (Ryukyu Group).

Fore-reef rhodoliths of the Ryukyu Group.


Cretaceous convergent tectonics of SW Japan.
  • Geologic Age : Mesozoic (Cretaceous)
  • Area : Kochi and Ehime Prefectures (Shikoku Island)





Carboniferous–Permian mid-Panthalassan atoll carbonates in an accretionary complex,Akiyoshi, SW Japan
  • Geologic Age : Paleozoic (Carboniferous to Permian)
  • Area : Mine City, Yamaguchi Prefecture, SW Japan

Limestone pinnacles on theAkiyoshi-daiplateau formed of Carboniferous-Permian midPanthalassan atoll carbonates.

Reef framework composed of chaetetids and microbialite in the Bashkirian part of the Akiyoshi atoll carbonates.

Great limestone cave, Akiyoshi-do


General geology of the Tsushima Island, Japan
  • Geologic Age : Cenozoic (Oligocene to Miocene)
  • Area : Tsushima Island, Japan

Syndepositional normal fault in the Taishu Group developed during early NW-SE crustal extension.

S-shaped asymmetrical minor fold in the Taishu Group developed during late NW-SE crustal shortening