Just ran into this detail in game.
Japan collects the 10 IPC NO as long as not at war with USA, has not invaded FIC, and has not made an unprovoked attack on UK/ANZ
In our game, Germany took England G3. Because this attack was imminent (12 G transports), UK and ANZ declared war on Japan during round 2 to grab NO money. Then on J3 when Japan attacked UK, I was thinking the NO was gone, but it’s not gone yet because the 3 conditions are met.
The NO on your chart (I think I printed my chart from this source - not entirely sure!) says “…cannot declare war on UK/ANZ” but this is misleading, because J can declare war on UK/ANZ if UK/ANZ declared on J first, and still collect the NO. I think it would be a major improvement if you edited the wording to include “unprovoked” or something to that same effect.