I went to this dessert shop/cafe for my birthday with my boyfriend. Immediately, we were bathed in a sense of eloquence and refinement, not only from the interior design of the cafe, but also from the servers. They were very good, with much attention to detail; even though they spoke little English, they made every effort to be friendly and to make our order clear and concise. It is high class, but not ostentatious, as many higher end places tend to be. The interior design is quite modern, with many reflective Art Deco light fixtures and an amazing looking kitchen from behind the tallest sliding doors I've ever seen in a dessert shop. It was so impressive and we hadn't even tasted the desserts yet!
As eye-appealing as they were delicious, the cake sets we ordered were so nice to enjoy. I can count on one hand how many dessert shops that have truly impressed me - Sadaharu is no exception. I know that I'll be back before long.
If you have no time to sit and enjoy a coffee/tea with your cake, they have many desserts can be ordered from behind a glass display that is entirely unique to Sadaharu. It's a quite a treasure, this shop, and I would definitely recommend it to anyone, even those who do not have a sweet-tooth.
One caution: it's not cheap. Two people can easily rack up a 3000+ yen bill with just two drinks and two cake sets. But it's worth every Yen you spend.