edit: this post was written before knowing MrGrogu's hand.
# triple finesse
I regularly advise on the forum to not trust (at least initially) triple finesse on yourself, and check multiple times double finesse. Here it's a triple, so I would not assume m2+m3+m4.
# bluff
Now can it be a bluff? That would tell Kaz they got g5 which doesn't work. But if you hold g5, then now that 5 is known to be m5, and that seem pretty good.
Clue count is important too, if it's 0, then Nishi can't interfere with the clue, and the lie work well.
If it's more than 0, then can Nishi clue your bluff and desynchronise everyone? That would mean that from Nishi pov they see that nobody hold a multi card, and so they hold m2+m3+m4, which is unlikely. So not clueing you seem strong too, especially at 5 players.
And so I think that's enough strong to stop here, and play our finesse position. If I'm right: it's a bluff and you hold g5.
Tricky spot for sure.
edit²: while that spot worked for me, I'm unsure the answer to your question is 'yes'. As I said earlier, the spot seem risky.
edit^3: Kaz could hold m3 from their's pov too. But if g3 played from elimination (seeing g5 you should hold, and maybe seeing m5 from Kaz's pov) that could depend of how green was saved. That's highly context dependent then.