As indicated, the place isn't temporarily closed but very much open, much to our delight, especially for lunch, as they serve a different menu each day, which you can view on their website or see posted outside. The owner prepares a healthy and complete menu daily, including a starter and a main course served with green tea for only 17 euros. It's best to arrive right at opening time, around noon, as it fills up very quickly. Payment is made across the street at the delicatessen.
A truly great Japanese address to add to your list.
Tasting events are also organized there.