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Urahoro Group
- Coherent formation
- Middle - Late Eocene
- Correlation: Horonai Formation (?), Ishikari Group
- Sedimentary facies: Terrestrial (Fluvial) - Marine
- Depth of water: Shallow marine
- Thickness: 735 - 780 m
- Upper limit: Unconformity
- Lower limit: Unconformity
- Shiranuka hills
- [ Upper ] Onbetsu Group
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- Shakubetsu Formaiton
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- Shitakara Formation
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- Yubetsu Formation
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- Rushin Formation, 38.0 Ma
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- [ Lower ] Nemuro Group
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kushiro seashore (Horonai - Todo-iwa, Kokomanai seashore), Kushiro city - Shiranuka hills, Shiranuka city, Hokkaido
- Fossils: Bivalve, Foraminifera, Plants (Coal)
- Katagiri et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.9, pp.495-503, DOI