What Is a Monthly Mansion?

A "monthly mansion" (マンスリーマンション) is a short-term, fully furnished apartment available to rent by the month in Japan. Unlike standard rental apartments, monthly mansions require no key money, no guarantor, and minimal paperwork — making them ideal for business travelers, relocating professionals, students, and anyone needing flexible accommodation in Tokyo.

Step 1: Define Your Needs Before You Search

Before opening any search platform, get clear on your priorities. Ask yourself:

  • How long will you stay? Monthly mansions typically start at one month, with discounts for longer stays.
  • Which area of Tokyo do you need to be in? Proximity to your workplace, school, or key transport hubs should drive your location choice.
  • What is your budget? Include all costs: rent, utilities (if not included), and any administrative fees.
  • What size unit do you need? Solo travelers can comfortably manage a 1R or 1K; couples or longer stays often prefer a 1LDK.

Step 2: Use Reputable Monthly Mansion Search Platforms

Several Japanese platforms specialize in monthly mansion listings. Key ones to know:

  • マンスリー48 (Monthly 48): One of the largest dedicated monthly mansion databases in Japan.
  • WeXpats Housing: Offers English-language support, useful for international renters.
  • Sakura House / Oakhouse: These share-house operators also list private monthly units.
  • Leo Palace 21: A nationwide chain with a large Tokyo inventory, English support available.
  • SUUMO / HOMEsJapan: General real estate portals that also list furnished short-term rentals.

Step 3: Understand the Fee Structure

One of the biggest advantages of monthly mansions is their simplified cost structure compared to standard Japanese rentals. Here's what you'll typically encounter:

  1. Monthly rent: The base cost, usually quoted all-in or with utilities listed separately.
  2. Administrative fee: A one-time setup fee, often equivalent to half a month's to one month's rent.
  3. Cleaning fee: Charged at the end of your stay, usually ¥10,000–¥30,000.
  4. Utility deposit: Some providers ask for a prepaid utility deposit, refunded or credited at checkout.

Crucially, you should not be asked for traditional "key money" (礼金) or a large security deposit in most monthly mansion arrangements — if you are, clarify why before proceeding.

Step 4: Contact Providers and Ask the Right Questions

Once you've shortlisted units, reach out to providers and confirm:

  • Are utilities (water, electricity, gas) included in the rent?
  • Is Wi-Fi included? What is the approximate speed?
  • What is the earliest move-in date available?
  • Is the unit non-smoking? Are pets allowed?
  • What is the process if you need to extend or shorten your stay?
  • Is there a resident support line in your language?

Step 5: Review the Contract Carefully

Even for short-term rentals, you'll sign a contract. Key points to check include the cancellation policy, penalty fees for early departure, and any restrictions on guests or use of the space. If the contract is only available in Japanese and you're not fluent, ask for a summary in English or consult a bilingual advisor.

Step 6: Prepare Your Documents

Requirements vary by provider, but you'll typically need:

  • Valid passport or residence card (在留カード)
  • Proof of employment or enrollment (for longer stays)
  • A Japanese phone number or email address for contact
  • Payment method: credit card is widely accepted; some providers require Japanese bank transfer

Final Tip: Book Early for Peak Periods

Tokyo's monthly mansion market tightens significantly around April (the start of Japan's academic and corporate year) and September. If your move date falls near these periods, start your search at least 4–6 weeks in advance to secure your preferred unit.