We stayed in the Japanese-style apartment, which was a great size for our family of four. Unfortunately, the experience was let down by one major issue: you’re not allowed to open any windows or external doors, as doing so triggers the building’s alarm system. I understand this is in place for safety reasons, but it made the apartment feel quite claustrophobic and stuffy, especially over a four-day stay. It was disappointing not to be able to get any fresh air at all, and I strongly feel this restriction should be clearly communicated before booking—especially for a family-style apartment. Had we known about this in advance, we likely would have chosen a different hotel. That said, the apartment itself was otherwise comfortable, and we really enjoyed the Ueno area.