Written by: Jin Fujisaki / Published: 2026-02-23
You want to decorate your planner or notebook cutely with stamps. But because traditional wooden or rubber stamps don't let you see the stamping surface from above, you've probably had the disappointing experience of pressing down only to find the image is misaligned or crooked. The product that solves this long-standing source of stress for stamp lovers, with breathtakingly beautiful design, is "Koorijirushi" (Ice Stamp), the transparent stamp from King Jim (HITOTOKI brand).
True to its name, every part — from the handle to the stamping surface — is made of see-through acrylic and clear materials. The cool, refreshing visual, like tiny square ice cubes resting on your desk, has such polish as a stationery item that simply collecting and displaying them is enough to satisfy your sense of ownership.
| The Joy of Stamping Exactly Where You Want
image King Jim
Koorijirushi's greatest strength lies in the "overwhelming visibility" made possible by its transparency. When you peek down at the stamp from above, the lines on the paper, the text already written, and the patterns of stamps you've already pressed are all visible right through it.
This means demanding positioning tasks like "I want it to sit perfectly on this ruled line" or "I want to stamp it right next to this letter" can be done reliably down to the millimeter. Even advanced techniques — lining up multiple stamps to create patterns, or overlapping designs on top of one another — are foolproof with Koorijirushi. The thrill of "landing exactly where you aimed" is so addictive that once you experience it, you can never go back to opaque stamps.
| Because You Can See the Ink Coverage, You Can Prevent Patchy Prints Too
image King Jim
The benefit of being able to see through the stamp from above isn't limited to alignment. When you press the stamp onto an ink pad, you can clearly see "how much ink is on the stamping surface."
This lets you prevent that classic stamping tragedy — "the edge wasn't inked, so the print came out incomplete" — before it happens. You can also take advantage of this feature to ink only half the stamp with a different color, or use a cotton swab to apply ink for a gradient effect, freely enjoying delicate multi-color arrangements.
| Made of Acrylic, So Cleaning Is "Just a Quick Wipe"
image King Jim
Stamps with wooden handles have the drawback that any stray ink soaks in and gradually leaves them looking grubby. The handle of Koorijirushi, however, is made of smooth acrylic.
Even if ink gets on it during use, a quick wipe with a wet wipe or cloth instantly restores its like-new transparency. Since the ink doesn't soak in, there's no risk of color contamination the next time you use a different shade. The fact that "it's easy to keep beautiful" is another point highly valued by users who enjoy decorating their planners daily.
| In Summary: A Failure-Free Sense of Security That Brightens Your Planner Time
image King Jim
Prices vary by size, but the small size runs around 600 yen, while the large and long sizes are around 700 yen (tax included). In 2025, the long-awaited second wave of designs was released, along with a dedicated "Koorijirushi Stamp Pad" that pairs perfectly with the stamps, fueling their popularity even further.
If you've always thought "I'm not good at stamps because I'm afraid of messing up," then Koorijirushi is exactly what you should try. Why not step into a world of stress-free, beautiful decoration — like dropping a tiny ice cube onto the margin of your planner?
