I-351-Class Submarine FAQs:

Q: Were I-351-Class Submarines ordered under the 5th Fleet Replenishment Program of 1942 to support IJN flying boats in areas where there were no shore facilities and seaplane tenders could not operate?

A: Yes.

Q: Were I-351-Class Submarines initially equipped to carry 365 long tons of aviation gasoline?

A: Yes, and 11 long tons of fresh water, and either sixty 550-pound bombs or 30 bombs and 15 aircraft torpedoes.