Per Wikipedia, "Japanese cheesecake (also cotton cheesecake or light cheesecake) is a type of sponge cake originated in Hakata, Japan in
1947.....The cake was popularised in the 1990s as the signature dish of Uncle
Tetsu's Cheesecake bakery."(1) And "...Uncle Tetsu's Cheesecake (てつおじさんの店 Tetsu-ojisan no mise) is a bakery store that originally began in 1990 on Oyafukou Street in the
Hakata area of Fukuoka, Japan, and which sells Japanese cheesecake as its signature dish. The store was founded by Tetsushi Mizokami, the namesake for "Uncle Tetsu". (2)
What is the difference to "Hokkaido Baked Cheese tarts"? Regarding "Hokkaido Baked Cheese tarts": "It’s actually a Malaysian brand, owned by the same company behind the Malaysian food chain, PappaRich." (3) As per their Australian website: "...Inspired by the distinct cheesy taste of Hokkaido dairy, and using a traditional recipe from Japan’s dairy heartland, ..."(4) and "having successfully launched in Malaysia, Japan, Singapore, Thailand, Vietnam, Indonesia, Brunei and China. After tireless taste testing using local ingredients, Hokkaido Baked Cheese Tart has succeeded in recreating the Hokkaido cheese flavour to perfection.....The original Hokkaido Baked Cheese Tart stores first launched in Malaysia in mid-2016. Demand ran hot – and now the legendary Hokkaido Baked Cheese Tart stores sell up to 20,000 cheese tarts per day. " (5)
(1) https://en.wikipedia.org/wiki/Japanese_cheesecake Accessed 4 January 2020.
(2) https://en.wikipedia.org/wiki/Uncle_Tetsu%27s_Cheesecake Accessed 4 January 2020.
(3) https://appetiteforjapan.com/2017/04/22/uncle-tetsus-hokkaido-cheese-tarts-australia/ Accessed 4 January 2020.
(4) http://www.hbctaus.com.au/ Accessed 4 January 2020.
(5) http://www.hbctaus.com.au/pages/our-story Accessed 4 January 2020.