One of my favourites shops here in London is Minamoto Kitchoan.
They have stores in London, New York and Singapore.
The cakes and sweets are delicious and look like small pieces of art! A sign proclaims that Japanese confectionery is healthier than western sweets as the Japanese version are low fat, making use of things like bean paste and chestnuts.
On this photo an Oribenishiki and green tea!