[saikit]

As other commenters noted, this is not a particularly Japanese method of ice coffee brewing.

This Kyoto-style coffee tower, however, is:

http://drinks.seriouseats.com/2014/03/japanese-style-slow-dr...

[cmccart]

Additionally, Serious Eats also did a cold-brew method comparison, which may be of interest:

http://www.seriouseats.com/2014/05/whats-the-best-way-to-bre...

[jschulenklopper]

Which is an excellent article with a nice surprise at the end.

> With milk, the diner-style and cold brew tasted the best, whereas the Japanese style and immersion-over-ice were terrible, their bright flavors clashing with the creamy dairy, giving them the flavor of curdled milk.