Define operational status? Only photos folks have been able to dredge up for YEARS are of dubious nature and NOT proof of anything. The most common photos show them resting at an airfield where they were stored for an invasion that never happened (though it was in Manchuria, an area I don't think our B-29s were targetting).
Of the planes supposedly built in this setup, the majority were held in reserve and never sent into action. Finding actual proof would be big news, indeed.
Are you willing to share said photos?
Same photos on the runway, but the combat record of the 104th Sentai show the Otsu was used in combat, loses to B-29s were accounted over Manchuria - this is the best information I can gather, unless one of our japanese friends can get us some information on the 104th.


Krusty you should know by know I require sourced information and proof - a Photo of the Otsu on runways along with a kill record for that squad could mean anything - but trying to prove without a doubt is going to be impossible.
I cannot get wartime records for the 104th Sentai, or any information on this squadron period - I know they operated different types of aircrafts, for all I know the Ki-43 could of been what shot down those B-29s.
I believe we all have the same information, question is does anyone have proof it was/wasn't in combat.