Guess it was 2012 time frame when I purchased my 360J. Man time sure flies. The below link is to a previous thread and you can read the information about the Japanese contract.
Kernal Krittendon, may he RIP, was a very knowledgeable member of the Forum and was pretty good at his research. I disagree with him though on these not being overruns from a canceled contract. When this batch surfaced they flooded the market and then were gone in this configuration.
Not sure if the photo will show up but I also had located a model of the Japanese 360J that the Kernal pointed out to be a replica firearm from a Japanese Company that made realistic replica firearms for the Japanese market. I have been unable to locate the photo again and it appears that Tanaka had removed them from the catalog.
I do remember the grips though and they were unique and pretty cool looking. They were a rubber fuller size grip but at the bottom they were cut out to accommodate the lanyard loop.
M360J Grip Frame
Here is also a link to an article from The Truth About Guns where the Japanese 360J Service revolver is covered. Hope the link doesn't violate any rules.
Gun Review: Smith & Wesson 360J Japanese Service Revolver - The Truth About Guns
As you scroll through this article and get to the 360J information you can see a photo of Japanese Police Officers carrying with the lanyard loop attached.
[ame]https://www.youtube.com/watch?v=QIT6l8y0_cE[/ame]
And to round it out I found this old YouTube video of one of the Tanaka Replica 360J's that shows how the grips looked on the Japanese PD versions.