I don’t normally focus on WW1 era techou, but I could not pass up this example. This techou belonged to an artilleryman who was part of the Siege of Tsingtao in 1914, the first year of WW1. With the commencement of the Great War, conflict spread to Germany’s colonies, which included the port of Tsingtao. With the help of the U.K., Japan was able to lay siege to the German colony and ultimately capture it, and in the process, take over 4,000 German prisoners (I believe Nick has written about the Bando POW camp). A special (albeit a little wormy) booklet belonging to someone who witnessed and took part in a fascinating chapter of WW1 history. Below is the history page with Tsingtao fortress entry, a brief summary of what is written, and a few pics. of Japanese artillery at the siege from online (National Army Museum (2) and Wikimedia Commons).
Summary:
August 16, 1914 (Taisho 3): Joined 1st Company, Replacement, 24th Field Artillery Regiment (18th Division)
Sept. 27, 1914: Left Moji, Japan
Oct. 1, 1914: Landed at Laoshan(?), China
Oct. 4, 1914: Became member of 6th Company, 24th FA Regiment
Oct. 29(? -little wormy there) - November 7, 1914: Participated in the attack on Tsingtao Fortress
December, 1914: Returned to Japan (Moji)
NOTE: with the pics., I would imagine this artilleryman worked with the smaller pieces as compared to the larger siege gun in the upper pic.

Click to enlarge the picture