Tokyo under $150 is rarely about spa lobbies or huge bedrooms. It is a clean bed, a private bathroom, working air conditioning, and a station you can reach without a long walk after a full day out.
Compact city hotels fill most of this budget: efficient layouts, sometimes a small desk, and neat bathrooms rather than spacious ones. Capsule stays can cost less, but they are a different trip—shared facilities and almost no private space.
If a room looks unusually large or luxurious for under $150 in central Tokyo, check the dates, the exact neighborhood, and whether taxes or cleaning fees sit outside the headline price. Late March to early April, Golden Week, Obon, and New Year can push the same room well over $150.
Treat the ceiling as a filter while you search, not a promise for every calendar week. When peak dates stack, widen the map one station out—Ikebukuro, Kinshicho, or a quieter pocket of Asakusa—before you abandon the budget entirely.