As far as I know the M360J was not a S&W catalogged item (Lipsey Distributor) & was a special run order. I'm pretty sure they haven't been had in 5-6 years but you occasionally see one pop up now & then.
A search of gun.deals doesn't show anybody has one anymore.
You can find them online at Buds Gun and other places. I bought one about 6 weeks ago at my local gun store for a around $400.
They are around. It's a really nice gun. The best of the non steel J frames. JMO.
They seem to pop up for short period of time every year or two.
I believe they are produced specifically for Japanese National Police and any over runs are released for public here.