The background to Japanese products — production history, construction and maintenance — from makers' own pages and official sources. We do not publish untested "best" lists.
Buy from Japan
Buy from Japan
Buy from Japan 
Buy from Japan Japanese Vacuum Mugs Compared on Maker Specs: Zojirushi SM-ZB and Tiger MKA-K
Zojirushi and Tiger vacuum mugs compared using only maker-published heat retention, cold retention, weight, size and price, measured under the same test condition.
Buy from Japan Japanese Knives Explained: Seki and Sakai, Knife Types, Steels and Whetstones
Seki and Sakai compared from official sources, plus knife types, blade materials and whetstone grit grades from Kai Corporation's official guide.
Buy from Japan Biore UV Aqua Rich vs Anessa Perfect UV Milk: What Actually Differs, from the Makers’ Own Pages
Both Japanese sunscreens carry SPF50+, PA++++ and ★★. From the makers' own pages we compare what actually differs: formula type, UV filters, scent, maker-stated tests, size, price per mL and air-shipping status.