The place has authentic Japanese ramen and delicious mochi, with their special drink - calpis. Should come early to get a table as it's quiet crowded in the evening.
Tasty broth! Noodles are the right texture. Waited for an hour but it was worth it. One thing to note though, if you're a tourist they only accept CASH or a Germany-issued card. Prices are reasonable!
I had the spiciest miso soup and it was really great. Beware of the spice though. I also tried the fried chicken - would recommend that one was 4-5 sharing the plate. Recommend the ice mocha.