Only in the sense that 'all' later period Japanese fighters had problems with the
quality of the metal forgings used in the gear. The main reason for the gear
collapses of the N1K1-J was the need for the gear to reduce in length for
stowage. Moot anyhow as to carrier use, as the redesigned airframe wasn't stressed
for carrier ops being, like the J2M, a land-based fighter. The Raiden wouldn't have
been a good carrier aircraft either. Yes, I'm familiar with the 'developmental' work
mentioned in the SP thread and on the j-aircraft site, along with written sources like
Francillon, etc., regarding carrier conversion of the N1K. No agreement on actual numbers
that 'may' have been converted or tested.
Most likely use of carrier 'launched' N1Ks would be as one-way CAP for carrier launched
Special Attack aircraft. No need to worry about being able to absorb landing stresses.