Bucciali's source claims that it is LM2. For now, that's what we will call it until something more credible comes along that says otherwise.
>8^)
ER
Edit: Just a quick retraction/correction on what I said above. It was coffeym who told us the chassis number of the LM in Japan - he's certainly in a position to know. It was in bucciali's
Recap of Japanese F1 fleet thread - hence my confusion.