Very interesting. You may consider posting some of these photos on specialist militaria forums, where they might recognize some of the buildings or insignia on the uniforms. From what I can see, it looks like the soldier was first stationed in Manchuria (that's what I guess by looking at the fur hats and the railroad). Then he was shipped to the Philippines as Japan was realizing that they needed more manpower in the Philippines to stop/slow the Americans there.
pic 9440
昭和十三年二月二十八日
結婚記念
Feb 28, 1938
Wedding Picture
pic 9442
Censor stamp from December 10th, 1943
pic 9436
昭和九年度
檐架修業央
二十二名
1934
I'm not sure, but I think
檐架 is the name of a city in China/Manchuria that I can't pronounce, and the group has just finished some training. 22 people. The rest are the names of the people. Embossed on the photo is the name of a photography studio "Yachiyo Studio". Embossed under that is the location name, but all I can make out is Matsushima Town. Matsushima Town is a common name...could be anywhere (kind of like "Elm Street"...there are a million Elm streets in the US.)
If I search for the name of the city in China I only get one hit, and that is from a document describing the movements of the 2nd Artillery Division of
Mito. Its quite possible that its not the name of a city, and has some obscure war-related meaning. It doesn't appear in any Japanese online dictionaries, so that is why I think it is the name of a city/location in China. Coincidentally (or not) the 2nd Artillery Division was also sent to the South Pacific after a tour of duty in Manchuria.
You could also consider sending the items to the
Obon Society to see if they can identify the owner. They usually require the physical items, and the items will not be returned to you (even if they fail to find the owner). Or, the Japanese embassy nearest you may also have some information about repatriating war items. If you just want more information, you could consider some war-related forums, as I mentioned. One forum called War Relics has a section on Japanese militaria.