Photos of the Japanese in Siberia 1918-1922 can be found here:
http://www.armymuseum.ru/1920jap_e.html
http://www.armymuseum.ru/1920jap1_e.html
Lt.Amuro kindly supplied details on Commanders,Divisions deployed:
Vladivostok dispatch army
=Commander Gen.Kikuzo Otani(1918/8/3-1919/8/26) Gen.Shigemoto Ooi(1919/8/26-1921/1/6) Gen.Koichiro Tachibana(1921/1/6-1922/11/6)
12th Division (commander Lt.Gen.Shigemoto Ooi) 1918/7-1919/6
14th Division (commander Lt.Gen.Naohachiro Kurita) 1919/4-1920/10
3rd Division (commander Lt.Gen.Jiro Ooba) 1918/8-1919/4
5th Division (commander Lt.Gen.Soroku Suzuki) 1919/7-1920/8
13th Division(commander Lt.Gen.Torajiro Nishikawa) 1920/8-1921/5
11th Division (commander Lt.Gen.Suejiro Saito)1920/8-1921/6
9th Division (commander Lt.Gen.Hirotake Matsuura)1921/4-1922/9
8th Division (commander Lt.Gen.Jutaro Onodera)1922/4-1922/11