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10月 2026
8
th
[HOTEL MYSTAYS Ochanomizu Conference Center] Notice of Air Conditioning Equipment Inspection in Guest rooms on January 18, 2027
5
th
Update | Important Notice: Possible Exposure of Guest Information and Suspicious Messages
2月 2026
17
th
【HOTEL MYSTAYS Ochanomizu Conference Center】Up to 20% off meeting room usage for first-time customers only (~until December 31, 2026)
4
th
HOTEL MYSTAYS Ochanomizu Conference Center: Notice of construction work causing noise near the hotel from February 1, 2026
10月 2025
10
th
[Important] Request regarding the use of mobile batteries
3月 2023
24
th
[HOTEL MYSTAYS Ochanomizu Conference Center] Information on centralized air conditioning throughout the building, including Guest rooms
