FWIW, I was at Tokyo Motor Show a few weeks ago. Not only did I see almost no EVs in the almost 2 weeks I was in Japan (not including the show itself, I saw 3 Leafs, 1 https://www.toyota-body.co.jp/english/products/ev.html
in a car sharing spot and an i-Miev van: probably http://www.mitsubishi-motors.com/publis ... l0817.html
), there seemed to be little emphasis on EVs and PHEVs at any booth. I also saw at least 1-2 https://en.wikipedia.org/wiki/Mitsubishi_i
but I as unclear if they were ICEV kei cars or the EV i-Miev.
Last time I was in Japan (2013) I did notice that EVs were not that common in Tokyo and the other big cities, but I saw many in smaller towns throughout the country. Maybe because most eco-conscious city dwellers take the train and also lack parking/charging at home.
I did spot some Mazda EV prototypes in Hiroshima. I encountered a number of LEAFs and iMiEVs in Nagano-ken serving as both private vehicles and taxis (in Matsumoto). I actually noticed quite a few LEAFs on the highways when I did a week-long road trip through Kansai, Chubu, and Kanto probably owing to the proliferation of CHAdeMO stations at the already impressive rest stops. I had the opportunity to rent a LEAF but was carting four of my family members plus luggage so chose to stick with a Serena S-Hybrid.
The bolded part was the hypothesis re: big cities that another Leafer had (his stay in Japan overlapped w/mine and I met up him briefly). He also saw few Leafs and EVs. I guess that makes sense since it seems like parking is scarce in cities so having parking AND charging there is probably even tougher.
FWIW, this trip to Japan, I flew to Nagasaki and made my way to Nagoya then Tokyo via train. So, I visited/stayed in places like Nagasaki, Fukuoka, Kitakyushu, Beppu, Miyajima, Himeji, Kobe, Osaka, Nagoya then Tokyo. In Beppu (not a big city), I saw 2 Leafs. My memory is foggy about the 3rd Leaf, if I even saw it. I only had about 4 days in Tokyo. The rest was elsewhere in Japan.
From TMS, there seemed to be more hybrid model choices than here in the US. Honda had more (whereas, they've basically abandoned hybrids now in the US) and so did Nissan (e.g. X-Trail hybrid and Serena S-Hybrid). It looks like the latter is just a mild hybrid, similar to GM's BAS mild-hybrid system.