What Is Tsubo Unit Price? Conversion Methods Between JPY/m² and JPY/Tsubo

When browsing property advertisements and official land price data, you will notice two units mixed together: tsubo prices and JPY/m². Real estate ads mostly use tsubo prices, while official land prices and roadside values are published in JPY/m². Since the units are not unified, being able to convert between them yourself makes market comparison far easier. This article explains the relationship between tsubo and m², the conversion formulas, calculation tips, and points to note when comparing data.

The Relationship Between Tsubo and m²

Tsubo is a traditional Japanese unit of area, and one tsubo corresponds to a square of about 1.8 m per side (6 shaku × 6 shaku).

• 1 tsubo = approx. 3.30578 m²
• 1 m² = approx. 0.3025 tsubo

For example, a 30-tsubo plot is 30 × 3.30578 = about 99.2 m², while a 100 m² plot is about 30.25 tsubo. For small residential plots, figures at this level come up frequently, so it pays to get a feel for both units.

Converting JPY/m² to Tsubo Price

To convert a price in JPY/m² into a tsubo price, multiply by 3.30578.

• Tsubo price (JPY/tsubo) = unit price (JPY/m²) × 3.30578

If the official land price is 100,000 JPY/m², then 100,000 × 3.30578 = 330,578 JPY, or about 331,000 JPY per tsubo. For mental arithmetic, simply multiplying by 3.3 is enough; remembering that the tsubo price is roughly 3.3 times the JPY/m² figure is practical enough.

Quick Reference Table: JPY/m² to Tsubo Price

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Converting Tsubo Price Back to JPY/m²

To obtain JPY/m² from a tsubo price, divide by 3.30578 or multiply by 0.3025.

• Unit price (JPY/m²) = tsubo price (JPY/tsubo) ÷ 3.30578
• Or: tsubo price (JPY/tsubo) × 0.3025

For example, a price of 660,000 JPY/tsubo is 660,000 × 0.3025 = about 199,650 JPY, or roughly 200,000 JPY/m². Approximating with 0.3 reduces calculation mistakes.

Notes on Comparing Data in Different Units

Official land prices and roadside values are published in JPY/m². On the other hand, real estate advertisements and flyers often show tsubo prices. If you compare them without unifying the units, the perceived price of the same land can look far off. Make a habit of converting to a single unit before any comparison.

Also note that both tsubo price and JPY/m² are unit prices per area. The total price of a plot only becomes clear when you multiply the unit price by the area, so a higher tsubo price does not necessarily mean a higher total price.

Using the Tools and Pages on This Site

If manual calculation feels unreliable, enter the figures into the tsubo converter tool on this site (/tools/converter) to convert between tsubo prices and JPY/m² automatically. After converting, check the level and trend of official land prices on the prefecture-specific pages, and use the land price ranking to see where the area stands nationwide. Running the steps from data entry to conversion to area comparison as one flow is recommended.

Summary

• Conversion formula: unit price (JPY/m²) × 3.30578 = tsubo price; the reverse is ÷ 3.30578 (× 0.3025)
• Be aware that official indicators use JPY/m² while ads mostly use tsubo prices
• Unify the units first, then compare both unit prices and total prices

Tsubo conversion is a skill that pays off across the entire land-selection process. Please use the tools on this site as well for accurate market comparison.