The first time I tried to rent an apartment in Tokyo, I lost the listing because I asked, politely, whether the deposit was negotiable. The agent went pale, the landlord disappeared, and the building manager later explained, with the patience reserved for slow children, that questioning the deposit in Japan is not a negotiation tactic. It is a cultural error from which there is no recovery. I learned the lesson in cash, and I have been earning it back, in different forms, across three Asian cities ever since.
If you are a foreigner trying to find a home in Tokyo, Seoul or Taipei, the surface of the rental market looks broadly familiar. There are listings, agents, contracts, deposits, lease terms. Below the surface, however, each city operates on a logic that is invisible to outsiders and unforgiving of mistakes. This is a practical guide, written from inside the process, to the deposits, guarantor systems and document requirements that actually decide whether you sign a lease or sleep another month in a hotel.
Tokyo: the four-fee structure no one explains in advance
The single most disorienting feature of the Tokyo rental market is what the Japanese call shoki hiyou, or initial costs. Walk into any agency in Shibuya or Nakameguro and ask about a 180,000-yen apartment, and the agent will write down a number closer to 900,000 yen. They are not cheating you. They are quoting reality.
The four fees are, in order: shikikin (security deposit, typically one to two months' rent), reikin (key money, a non-refundable gift to the landlord, one to two months), chukai tesuryo (agency fee, one month plus consumption tax), and maebarai chinryo (first month's rent, prepaid). On top of these sit fire insurance (around 20,000 yen for two years), a lock-change fee (15,000 to 25,000 yen) and, increasingly, a guarantor company fee.
The guarantor question
For most of the post-war period, foreigners renting in Japan needed a Japanese national to act as personal guarantor. That world has largely ended, replaced by hoshou-gaisha, professional guarantor companies that charge between 50 and 100 per cent of one month's rent at signing and 10,000 to 20,000 yen annually thereafter. Major firms include Casa, Nihon Safety, Global Trust Networks and Aplus.
The practical implication is that you no longer need a Japanese friend willing to ruin their credit for you. You do, however, need to pass the guarantor company's screening, which checks visa status, employment, and increasingly, your social media presence and criminal history through Interpol channels.
Documents that actually unlock the door
- Residence card (zairyu card) with at least 12 months remaining on the visa.
- Certificate of employment in Japanese, on company letterhead, listing salary in yen.
- Most recent tax certificate (gensen choshu hyo) or three months of pay slips.
- Inkan registration if your employer or guarantor company requires it.
- Emergency contact in Japan, often a colleague or HR representative.
Seoul: jeonse, wolse and the math you must do twice
If Tokyo's complexity lies in fees, Seoul's lies in structure. Korea's rental market operates on two fundamentally different systems: jeonse, a lump-sum deposit-only model with no monthly rent, and wolse, a monthly-rent model with a smaller refundable deposit. As an expat, you will almost certainly encounter wolse, but you must understand jeonse to negotiate either intelligently.
A typical wolse contract in Gangnam or Yongsan in 2026 looks like this: a deposit of 50 to 100 million won (roughly $36,000 to $72,000) plus monthly rent of 1.5 to 3 million won ($1,080 to $2,160). The deposit is fully refundable at lease end, but it must be paid in cash on signing day, and Korean banks will not lend it to non-residents on standard terms.
The deposit-rent trade-off
Korean landlords often allow tenants to convert a portion of the monthly rent into additional deposit, or vice versa, at a conversion rate set by the Ministry of Land, Infrastructure and Transport. The rate, currently around 5.5 per cent annually, is published quarterly. If you can mobilise more cash for deposit, you can lower your monthly outflow significantly. If you cannot, you accept the standard ratio and budget accordingly.
The jeonse trap and the 2024 to 2025 lesson
Jeonse fraud cases peaked in 2023 and 2024, with thousands of tenants losing deposits when landlords defaulted and properties were sold below the deposit amount. Reforms enacted in late 2024 require landlords to disclose tax arrears and second-lien debt, and tenants must register their lease with the local district office (jeonse-kweon-deungki) on signing day to secure priority in any auction.
Documents Seoul actually checks
- Alien Registration Card (ARC) with the same address you intend to register.
- Bank certificate of funds proving the deposit is liquid in a Korean account.
- Employment contract translated into Korean with apostille if foreign.
- Lease registration receipt from the gu office (district), filed within 30 days.
Taipei: the warmest market with the strictest paperwork
Taipei's rental market feels, at first, like the most foreigner-friendly of the three. Landlords are typically individual owners rather than corporates, agents work on lower commissions, and English-speaking intermediaries cluster in Da'an and Xinyi. The deposit is straightforward, usually two months' rent, and there is no key money culture.
The complications come from two directions: tax registration and the renewable-lease question. Many Taipei landlords prefer not to register the lease with the tax authorities, which keeps their declared rental income low. They will offer you a discount of around 10 per cent if you agree to keep the lease unregistered. This is technically illegal, exposes you to eviction without legal recourse, and disqualifies the rent from your own tax deductions if you are filing in Taiwan.
The registration decision
I recommend, almost without exception, paying the higher rent and registering the lease. The protections are meaningful: you cannot be evicted without 30 days' notice, your deposit is held in a recognised escrow, and disputes are heard in housing-specific tribunals that decide most cases within 60 days.
Practical Taipei document list
- ARC (Alien Resident Certificate) with current Taipei address pending registration.
- Tax ID number if you are employed locally; passport otherwise.
- Two months' rent as deposit, paid by bank transfer, never cash.
- Witnessed signature if the lease exceeds 12 months, typically arranged by the agent.
- Household registration update within 15 days of move-in at the local district office.
What unifies the three cities
Across Tokyo, Seoul and Taipei, three things determine whether your rental experience is smooth or ruinous. First, the quality of your agent: a cheap agent in any of these cities will cost you more than an expensive one, and the difference shows up in the language of the contract, not the rent. Second, the speed with which you provide documents: in all three markets, the apartment goes to whoever signs first, and "first" is measured in hours, not days, in the most desirable neighbourhoods. Third, your willingness to ask the right questions in writing.
Ask, in writing, about every fee, every renewal clause, every restoration obligation at lease end, and every restriction on registering co-occupants. The answers, recorded in email or LINE or KakaoTalk messages, become your evidence if a dispute arises later.
Three years and four apartments after my Tokyo deposit lesson, I have learned that renting as an expat in East Asia is less about language and more about precision. Bring the documents, accept the deposits, find a guarantor company, and negotiate everything except the things that are not negotiable. The keys, eventually, follow.