---
title: "Lumos! Japanese Designer Creates a Super-Slim Bookmark That’s Also A Light"
description: "Japanese designer Kouichi Okamoto has used silver conducting and nanoparticle ink to create a bookmark that doubles as a nightlight."
date: "2016-07-22"
modified: "2016-11-29"
authors:
  - name: "Arra Dianne Hifarva"
    link: "https://futurism.com/authors/arrahifarva"
url: "https://futurism.com/lumos-japanese-designer-creates-a-super-slim-bookmark-thats-also-a-light"
categories:
  - "Robots and Machines"
tags:
  - "bookmark"
  - "nightlight"
---

# Lumos! Japanese Designer Creates a Super-Slim Bookmark That’s Also A Light

![](<https://futurism.com/wp-content/uploads/2016/07/A-Kouichi-Okamoto.jpg>)
*\<em\>Image: Kouichi Okamoto\</em\>*

The reading world has done another 180. E-book sales are now falling while hard copy book sales are back on the rise. The only thing that goes better with a book than a bubble bath is a good bookmark.

A Japanese designer named Kouichi Okamoto created a bookmark with a twist. He calls it the Bookmark Light. In the light of day, it is just like any ordinary bookmark out there. However, in the dark, it can transform into a night light. You no longer need to bring that flashlight to read under the covers.

![](<https://futurism.com/wp-content/uploads/2016/07/bookmark-light-big-2.jpg>)
*Credit: Kyouei Design*

In order for the light to operate, a lithium coin battery is placed into a slot and then the film is folded to complete a circuit. The current is conducted by a combination of silver and a nanoparticle ink.

The bookmark can be bought online via the [Kyohei Works](<http://www.kyouei-ltd.co.jp/bookmark_light.html>) website for ¥2, 128 or roughly $20, which includes shipping fees.