[Important Notice] JewelryDIANA Japanese-made Gold and Platinum Product Price Revision Scheduled for February 2, 2026 (Monday)

Thank you for always using MPM Musashi.

Today, we have an important announcement regarding our main product, the JewelryDIANA brand of Japanese-made jewelry.

■ Items subject to price revision

This price change applies to the following products:

• JewelryDIANA and JewelryDIANA J-ENDAi (high jewelry) brand gold products (10K, 18K) and platinum products made in Japan

* The JewelryDIANA Lumière Japan brand is not included in this offer .
Lumière Japan currently does not produce gold or platinum products.

■ Background of price revision

All of JewelryDIANA's gold and platinum products are made to order at our second factory in Kofu.

We have received official notice from the factory regarding a price revision due to rising raw material prices and increased processing costs.

We have been trying to maintain prices as low as possible up until now, but in order to continue to maintain our manufacturing system and quality in Japan, we are forced to revise the prices of some products .

■ Scheduled implementation date of price revision

Starting Monday, February 2, 2026 , we plan to revise the prices of eligible JewelryDIANA products.

*The details of the revisions vary depending on the product.

■ About ordering at the pre-revision price

We will accept orders at the current price until Sunday, February 1, 2026 , before the price change.

All JewelryDIANA products are made to order, so there is a deadline for placing orders at the previous price.

If you are considering purchasing a particular product, we recommend placing your order as soon as possible.

■ About silver products

Prices for Japanese-made silver products will also be revised in the near future due to the impact of raw material prices.

We will provide further information once the details have been confirmed.

MPM Musashi will continue to work in cooperation with Japanese jewelry factories, striving to provide honest manufacturing and stable quality.

We would appreciate your understanding.

MPM Musashi
JewelryDIANA Management Headquarters