New vs. Pre-Owned Condominiums in Japan: Five Axes That Actually Determine the Smart Buy

You are considering a condominium purchase. Sooner or later, you hit the same question every buyer in Japan confronts:

"Is new construction or a resale unit the better deal?"

Search online and you will find a flood of opinions. "New is safer." "Used is cheaper." All partially true. All incomplete.

Here is why none of them settle the question: the word "better" means different things to different buyers.

This article cuts through the noise with five analytical axes — so you can reach your own conclusion, on your own terms.

Axis 1 — Price Structure: The "New Construction Premium"

The sticker price of a new condominium in Japan includes costs that simply do not exist in the resale market.

• Model room construction
• Large-scale advertising campaigns
• Sales-company overhead and profit margins

Industry analysts commonly estimate that 20–30% of a new unit's price is this "new construction premium."

In plain terms: a ¥50 million new condominium is worth approximately ¥35–40 million the day after handover. Before you unpack a single moving box, ¥10 million has evaporated.

The resale market, by contrast, is shaped by supply and demand. Comparable transactions are publicly traceable, and price formation is more transparent.

This is not a verdict that "new is a waste." It is an invitation to ask yourself: Do I actually get ¥10 million of value from being the first occupant?

Axis 2 — Long-Term Asset Value: The Depreciation Curve Is Not Linear

Japanese government data shows a clear pattern in how condominium values decline over time.

• Year 0 to 5: Steepest drop — roughly 5–7% per year
• Year 10 to 20: Gradual decline — 1–2% per year
• Year 20 and beyond: Nearly flat, sometimes stable, depending on location

Buy new and sell five years later, and you are exiting at the worst point of the curve.

Buy a unit that is 15–20 years old, and you have arrived after the biggest losses have already been absorbed. From that point forward, value erosion slows considerably.

From a pure asset-value perspective, pre-owned units are often the rational choice — provided the location, management quality, and neighborhood trajectory support long-term resilience.

Axis 3 — Total Cost of Ownership: The Silent Escalator

New condominiums in Japan typically launch with intentionally low monthly management and repair reserve fees.

The reason is simple: high ongoing costs hurt sales.

But around years 12 to 15, the first major renovation cycle hits. Repair reserve fees are commonly revised upward by 1.5× to 3×. A ¥10,000 monthly reserve at purchase becomes ¥30,000 by year 15. This is not unusual — it is the norm.

When you buy a pre-owned unit, that upward revision has often already happened. You see the real cost, not the marketing cost.

Three documents are non-negotiable before any serious purchase decision:

1. The 30-year long-term repair plan
2. Management board meeting minutes for the past five years
3. The reserve fund balance and delinquency rate

Reviewing these exposes costs that brochures will never show you.

Axis 4 — Visibility of Risk

A new building is a clean slate. That feels reassuring — but it also means every risk is still unknown.

• Neighbor disputes
• Whether the management association actually functions
• Latent construction defects
• Neighborhood change after the glow fades

With new construction, all of this is a blank box. The seller hands you a glossy brochure and calls it disclosure.

Pre-owned units are different. Ten or twenty years of history already exists.

• Repair records
• Management track record
• Resident demographics and community feel
• How the neighborhood has actually evolved

The information asymmetry that defines real estate transactions is meaningfully smaller on the resale side. And smaller information gaps lead to better decisions.

Axis 5 — Psychological Value: The Weight of "Never Lived In"

Everything above is logic. The final axis is emotion — and that matters.

"I want to be the first occupant." "I want an untouched kitchen." "I want to avoid other people's stains, smells, scratches."

These preferences are real. They just cannot be calculated.

What can be calculated is the maximum price you are willing to pay for them.

If "untouched" is worth a ¥10 million premium to you, and you enter the purchase fully aware of that tradeoff, it is a rational choice.

If you suspect that, five years in, new and used will feel indistinguishable — then that same ¥10 million could do a lot of other work.

So Which Should You Choose?

Simplified:

The real question is not "new or used."

It is: "Is this specific unit, at this specific price, appropriate for my specific goals?"

One Structural Note About Your Broker

Allow one honest observation.

Your broker earns commission only when a transaction closes. This is true whether the unit is new or pre-owned.

Structurally, a broker cannot say "don't buy this one." When you ask "is this price fair?", the answer you receive will almost always be "it's market rate."

What you need is a third perspective — one that is not a party to the transaction.

Someone who evaluates the land value, comparable sales, long-term repair plan, and demographic outlook. Someone whose income does not depend on whether you sign.

That is what we mean by "democratizing the home-buying decision."

Summary

• New construction carries a 20–30% "new premium"
• The steepest value drop happens in the first five years
• New management and reserve fees are designed to be raised later
• Pre-owned units offer a visible track record
• The value of "psychological newness" is real — but quantify it before paying for it

Stop asking "new or used." Start asking: "Is this unit, at this price, right for me?"

That is the only question that matters.