Is it okay to put Kimura Glass glasses in the dishwasher or wash them with hot water?

Kimura Glass glassware products cannot be used in dishwashers, microwaves, ovens, or over direct heat sources such as gas or induction^[1][2]. Glass can be damaged not only by physical impact but also by sudden temperature changes^[3]. In particular, if a glass is wrapped in a wet cloth or placed in a cold area while hot, there is a risk of breakage due to rapid cooling^[4]. You should avoid actions such as pouring boiling water into it or immersing a heated glass directly into cold water.

Careful attention is also required when washing. Since abrasives or metallic scouring pads can cause micro-scratches on the surface leading to breakage, you should use only a soft sponge^[5]. If you dissolve a neutral detergent in lukewarm water, gently wash by hand, and wipe off moisture immediately with dry linen or similar material, you can store it transparently without stains.