What Japan could replace after the Kantō earthquake

If a Japanese carrier-conversion hull were wrecked in the Kantō earthquake, could Japan build a replacement?

Yes, but the replacement would be a normal carrier rather than another experimental ship like Hōshō.

The treaty question turns on whether the lost hull was being converted and whether a replacement remained allowable. Japan could construct a new carrier after an earthquake loss. The replacement would be treated as a normal part of the carrier programme rather than another experimental ship. That distinction matters because Hōshō's experimental character gave it a special place in the accounting and development sequence.