Estimate capsule hotel costs.
Capsule hotels price the sleeping berth and charge separately for the things a conventional room includes. Luggage storage is the notable one, because capsules have no space for a suitcase and the fee is effectively mandatory rather than optional. Amenity or bath-house access is charged per night at many properties. Accommodation tax then applies to the whole subtotal including those fees, so the all-in nightly figure typically runs 15% to 25% above the advertised capsule rate.
Capsule hotel cost
Subtotal = capsule rate x nights + luggage fee + amenity fee x nights; total = subtotal x (1 + tax rate)
In practice yes if you have anything larger than a daypack, because the capsule itself has no space for it. Treat it as part of the room cost rather than an optional extra.
Comparable once fees are counted, and often a little more. What a capsule buys over a dorm bed is privacy and quiet rather than a lower price.
Most capsule hotels allow it but require you to clear the capsule daily, which is why luggage storage recurs in practice. Some cap consecutive stays, so check before booking a long stay.