Japan wiki gives a good summary of the Raiden.
https://ja.wikipedia.org/wiki/%E9%9B...A9%BA%E6%A9%9F) Google Chrome browser has auto translate.
In summary the Raiden had many development problems that slowed its acceptance (planes and pilots lost) and by the time it was "ready" the competitor Kawanishi N1K1-J Shiden had superiority in dogfighting and range.
Unfortunately the N1K1-J was a "P.O.S." as Sakai and Honda says!
see at 3:28min
https://www.youtube.com/watch?v=3H_9iR7zvMk&t=434s