Just wanted to share an FYI from our recent trip to Kagaya. I tried to make a reservation on this board (you'll see the request a few posts down), but never got a reply. We didnt think much of it, and went anyway.
Mark was not expecting us. He explained that he doesn't use this board for reservations - that calling him is the best way to make a reservation.
Of course, he's completely amazing and let us in to sit at a table regardless of our failure to make a reservation (Mark is truly amazing and has a beautiful, hilarious soul). The night ended up being the most unforgettable of our entire stay (I recommend making this the 'last stop' on your vacation). I'll never forget my trip to Kagaya, and can't wait to visit Mark again!
Passing the above along as an FYI for anyone who is English-only, like me :)