You are quite right bro, Japanese products are of great quality, and for sure that's one reason behind this shopping spree. Beyond durable consumer goods, apparels and FMCG, Japanese cultural goods are also selling like hot cakes here too, though some Korean cultural product lines seems to have an upper-hand these few years.
On that note, Chinese goods are popular in Japan , and there is an obsession on Chinese cultural products.
Last year over 5 million Japanese tourists visited Greater China (Mainland, Taiwan, HK, Macao).
More Japanese visit China than any other country. More than America.