By you own admission Raptor1, you stated that the boats that participated and/or sunk in the Solomons Campaign. The I-7 was very active in the beginning of the campaign. In October 1942, I-7 shelled Esprito Santo twice and also conducted an aerial recon and periscope recon of the same.
I-7 TROM
http://www.combinedfleet.com/I-7.htm
More I-7 information
http://users.bigpond.net.au/ijnsubsi...etails/I-7.htm