---
title: "Tsubo — Class A Atlas glossary"
description: "Japanese unit of floor area, ~3.305 m²."
canonical: https://classa.info/glossary/tsubo
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Japanese unit of floor area, ~3.305 m².

## TL;DR

- Japanese unit of floor area, ~3.305 m².
- Default unit for office leases in Japan.

# Tsubo

*Measurement · APAC*

## Short definition

Japanese unit of floor area, ~3.305 m².

## Full definition

Default unit for office leases in Japan. Quoted rent is typically per [tsubo](/topics/apac-lease-conventions) per month. 1 tsubo = 2 tatami mats. Convert rent: USD/m²/month × 3.305 = USD/tsubo/month.

## Why this matters for Class A leasing

Tsubo is part of the measurement vocabulary that institutional [Class A](/glossary/class-a) occupiers, landlords, and advisers use across APAC markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the APAC definition alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

## Related topics

- [**Cross-border Expansion**](/topics/cross-border-expansion) — How to run a coordinated Class A office search across multiple geographies.
- [**APAC Lease Conventions**](/topics/apac-lease-conventions) — How APAC office lease conventions differ from US/UK — and how to translate before signing.

---

Citation: Source: Class A Atlas (https://classa.info/glossary/tsubo), updated 2026-04-01T00:00:00.000Z.