18K Platinum price in Japan today — June 2, 2026
Live price of 18K platinum in Japan per gram in local currency (Japanese Yen). 18K contains 75.0% pure platinum, mixed with alloys for durability — widely used for fine jewelry, luxury watches and engagement rings.
Other Platinum karats in Japan
Tap any karat to see its dedicated page with live price, uses and FAQs.
| Karat | Live platinum price per gram | Live platinum price per ounce | Live platinum price per kilogram | |
|---|---|---|---|---|
| 24K | 9,924.51 | 308,686.9 | 9,924,514 | Details |
| 22K | 9,097.47 | 282,962.99 | 9,097,471 | Details |
| 21K | 8,683.95 | 270,101.04 | 8,683,950 | Details |
| 14K | 5,789.3 | 180,067.36 | 5,789,300 | Details |
| 12K | 4,962.26 | 154,343.45 | 4,962,257 | Details |
| 10K | 4,135.21 | 128,619.54 | 4,135,214 | Details |
| 9K | 3,721.69 | 115,757.59 | 3,721,693 | Details |
18k platinum price in other countries
Compare today's 18k platinum price across local markets.
Most common uses of 18K Platinum
- Catalytic converters in diesel vehicles
- Hydrogen fuel-cell catalysts
- Luxury jewelry and watches
- Laboratory and medical equipment
Key industries using Platinum
Platinum price history — a quick overview
Over the past two decades, platinum has moved from under $400/oz in the early 2000s to record highs above $2,000/oz, driven by inflation, central-bank buying and safe-haven demand. Local prices in Japan also reflect the Japanese Yen/USD exchange rate, so periods of currency weakness amplify the rise of platinum prices for local buyers.
About 18K Platinum prices in Japan
This page is dedicated to the 18K platinum price in Japan, expressed in local currency (Japanese Yen). 18K is 75.0% pure platinum, with the remainder being alloy metals that add hardness, color and durability. In Japan it is one of the most traded purities for jewelry, gifts and personal investment — buyers, jewelers and appraisers monitor this exact purity daily because it directly drives resale value and making-charge calculations.