This is exactly the kind of "I'll just deal with it" decision that quietly costs you money — or leaves you underdressed at a moment when Japan really notices. Mio doesn't care about vibes; here's the math.
A cheap suit from a chain (Aoki / Aoyama / Konaka style) is often ¥15,000–30,000 for an entry set, and it's yours forever. A rental runs roughly ¥5,000–15,000 per occasion (jacket, trousers, shirt, tie — often shoes too), illustrative and varying by grade and season. Renting looks cheap once; it stops being cheap the second time.
| Times you'll wear it | Rent (¥8,000 each) | Buy once (¥22,000) | Cheaper |
|---|---|---|---|
| 1 (true one-off) | ¥8,000 | ¥22,000 | Rent |
| 2 | ¥16,000 | ¥22,000 | Rent (just) |
| 3 | ¥24,000 | ¥22,000 | Buy |
| 4+ | ¥32,000+ | ¥22,000 | Buy (clearly) |
So the break-even sits around 3 uses at these illustrative figures. Job-hunting alone means many wears (interviews, seminars, ceremonies) — buy. A single funeral during a short stay, and nothing else on the horizon — rent.
Funerals in Japan come with almost no notice and a strict expectation: plain black formal wear. Strictly, mofuku (deep-black mourning wear) is more formal than an everyday dark business suit, and it's something you'll rarely need. Buying a full formal set you might wear once in years is often a waste — this is the clearest case where rental wins, and many rental shops can deliver overnight for exactly this emergency.
Smart middle path: own one plain dark suit (covers job-hunting, ceremonies, and most everyday formal needs), and rent proper mofuku only if a funeral demands it. That collapses the "buy a rarely-used formal set" cost while keeping you covered day to day.
Wearing a suit 2+ times → buy a cheap chain suit. A true one-off, especially a funeral → rent. The "right" answer isn't about looking sharp — it's about how many times the meter runs.