Here's a few pictures from two manuals that describe the Type 10 and Type 11 grenades. The first two photos comes from "Handbook on Japanese Military forces TM-E 30-480" dated 15th September 1944. It describes the Type 10 grenade. The other pictures come from an original Japanese ammunition document that's mostly untranslated. Clearly next to the diagrams of the grenades you can make out "10th year type....Grenade" and "11th year type Grenade" written in Japanese. I hope to have this booklet fully translated someday. Information on early Japanese grenades is scarce. Hope this helps a bit.
Jim
JapaneseOrdnance(at)yahoo.com
Nice stuff Paul :tinysmile_classes_tGot a new camera for christmas and just had to take some pics of grenades.
heres a selection of japanese ones for starters.
paul.