Unidentified 2 :
Chlaenius deliciolus, 10-11.5mm. yours matches very well with the description and illustration on "The Coleoptera of Japan in Color Vol.II". But I have no information about its distribution outside Japan
Unidentified 5 :
Stenolophus quinquepustulatus, 5.3-6.5mm. Yours looks different from the typical one which has the apical spot and the 2 spots near it separated. But The Coleoptera of Japan in Color Vol.II said these spots varies greatly and they sometimes merge.
Chalenius junceus, 13-14mm. Characterized by the pronotum with large and dense sculptures, and of course, the shape and location of the yellow spots on elytra.
Hope these may help.