My only experience with japanese software is for cameras (e.g. mobile Apps which can connect to your camera via bluetooth/wifi) and these apps (I used Nikon and Panasonic apps) are definitely not that great, which you can also see from the reviews these apps get on the App Stores.
There is also a Video "Why are all cameras Japanese" https://youtube.com/watch?v=JKMsjXs4uq4 at minute 13:10 he also talks about the software culture in Japan.
He states (alledgedly sourced from an Interview of Software Developers in Japan) that Japan does not really respect software development as a career and it's viewed like a blue collar career, meanwhile craftsmanship and hardware stuff is considered a white collar career.