Totally late to the game but I finally tried Tsuta!

I had the Char Siu Ajitama Shoyu Soba (S$22.80) which has a heavier broth than its Shio counterpart because I'm all for flavours.

The soba (which I call ramen) is excellent. I loved the texture and slight chewiness of the noodles. I asked for a bigger portion and it was such a significant increase. Just for $1 more! The flavoured egg is pretty good, as long as it's cooked properly, you can't really go wrong with the flavour. The sliced pork collar char siu tasted a lot like the ham you would buy from the deli which didn't really appeal to me. Even though the soup had Truffle puréed with Truffle oil, I was pretty underwhelmed. I would leave most ramen places with the bowl empty but here, I couldn't really finish it.

Overall, I would say it's good and worth the price but not worth queuing long for.