Not many places make great Japanese baked products in the traditional way, so, with the exception of the Mt Thabor Hokkaido Milk bread, I wasn't that fussed about them as we have the TeToTe Factory (now in Ealing) that makes some of the very best example of Japanese baked goods - truly superb and leagues ahead in quality from what you generally get in Japan (and solid proof that it isn't the additives that make bread taste good)

But I haven't made a trip to Nishiogikubo yet to try Japanese breads from Lisdor Mitsu - which specialises in additive free hand made organic baked goods
http://lisdor-mitsu.com
Definitely a future pilgrimage for me, I'd also feel confident that you could get Japanese breads without animal fats here.