Time Out says
Located in the renovated mansion of Count Nagayoshi Ogasawara, built in 1927, this restaurant serves full course Spanish meals and wine within the fitting confines of the building's Spanish-style architecture. You have to make a reservation to get a place in the restaurant, which serves up a menu of very fancy European cuisine, but you can drop by the bar and café any time and dabble in the tapas-style snack menu.
10-10 Kawada, Shinjuku-ku
|Transport:||Wakamatsu-Kawada Station (Oedo line)|
|Opening hours:||11.30am-3pm, 6pm-11pm daily|