Tombow Pencil Co., Ltd. (President: Junichi Fukushima) has designated November 1st—a date featuring a triple repetition of the number “1” (evoking the concept of “only one”)—as “MONO Day.” This year Tombow is once again hosting a special appreciation campaign open to everyone via social media and other platforms.

For 2026 we will be giving away original MONO merchandise to a total of 111 winners selected through the social media platforms X (formerly Twitter) and Instagram. These exclusive not-for-sale items are sure to get you excited! The campaign, titled “MONO Day Giveaway Campaign 2026,” will run from Friday, October 30th to Tuesday, November 10th. The campaign website will go live on Friday, October 30th:
https://www.tombow.com/sp/monoday2026/

Giveaway Campaign: Original MONO-branded Goods

Prize A: MONO “Jan” 2026 (Jumbo-sized MONO eraser)
30 winners
Prize B: Original MONO Watch
20 winners

Prize C: MONO Eraser Plush Charm
10 winners

Prize D: Jumbo MONO Eraser
10 winners

Prize E: MONO Eraser Pin Badge
40 winners

“MONO Day” Prize: All prizes (A through E)
1 winner

Total: 111 winners

*Images are for illustrative purposes only. Specifications and designs are subject to change.

[How to Enter]
Via X (formerly Twitter):
1. Follow the official Tombow Pencil X account@tombowpencil.
2. Repost (retweet) the campaign post.
Via Instagram: 1. Follow the official Tombow Pencil Instagram account ( @tombowpencil ).
2. Post the specified comment on the campaign post.

MONO Day Campaign Website
https://www.tombow.com/sp/monoday2026/

Prize A: MONO “Jan” 2026

Prize B: Original MONO Watch

Prize C: MONO Eraser Plush Charm

(105×53×35mm)

Prize D: Jumbo MONO Eraser
(78×160×28mm)

Prize E: MONO Eraser Pin Badge
(44×70mm)

<“MONO Day” symbol>

Tombow Pencil Co., Ltd. has designated November 1st as “MONO Day.” MONO Day was certified and registered as a “commemorative day” by the Japan Anniversary Association (headquarters: Saku City, Nagano Prefecture) on January 11th of this year.
Starting this year, we will be positioning November 1st as a day to thank our MONO fans and will deepen communication with them through user participation campaigns and other activities.
The reason why the anniversary was chosen as November 1st is because MONO comes from the Greek word “MONOS,” which means “one and only,” and the date with consecutive “1”s is appropriate. Also, the MONO symbol mark is a three-color stripe of blue, white, and black, so the date with three “1”s standing up is appropriate.