I'm looking at:
A Bibliography of the First World War in the Far East and Southeast Asia
by Justin J. Corfield
Edwin Mellen Press, 2003: ISBN: 0773466622

A submarine article in the index is:
Fearn, J.B.
"Among the U-Boats"
North China Herald
22 September 1917.
(I will try to get this article through ILL).

The other submarine article is:
"History of the Japanese Submarine Navy, Part 2: 1912-1917"
Kawamura, Koya.
KTB (@#$%&) No. 105 (April 1994).

Mike Yared