Yuzuki Asako's 'BUTTER' Released in Kawade Bunko on June 15 with New Content — honto Launches Campaign to Gift Signed Special Cow Cards to Ebook Purchasers

honto (https://honto.jp/), a hybrid comprehensive bookstore jointly operated by Dai Nippon Printing Co., Ltd. (DNP), Maruzen-Junkudo Bookstore Co., Ltd., Bundo-do Co., Ltd., and 2Dfacto, Inc., is launching a campaign to commemorate the digital release of 'BUTTER' (Kawade Shobo Shinsha). The campaign offers a special cow-shaped card signed by author Yuzuki Asako to purchasers of the ebook edition.

The campaign application period runs from June 15 (Mon) to July 12 (Sun), 2026. Three winners will be randomly selected from customers who purchase 'BUTTER' on honto and complete the application via the campaign page.

◆ Campaign Overview

Campaign Name: 'BUTTER' Release Commemoration! Gift of Yuzuki Asako's Hand-Signed Special Cow Card

Campaign Period: June 15 (Mon), 2026 to July 12 (Sun), 2026

Application Page: https://honto.jp/cp/ebook/recent/kawade/present

Work Introduction

'BUTTER'

Translated into 40 countries with over 1.7 million copies sold worldwide — its English translation won four major awards in the UK! A masterpiece novel that explores desire, food, and women's lives through the dialogue between a female suspect in a serial dating murder case and a female journalist. A shocking dark thriller that has taken the world by storm.

Newly Included Content:

- Acceptance Speech for the Noma Publishing Culture Award: A Wonderful Standing Party at the Imperial Hotel

- UK Tour Diary: Novels and Karaoke Are Everywhere

About the Hybrid Comprehensive Bookstore 'honto'

Launched in May 2012, 'honto' is a comprehensive bookstore that integrates an e-book store, online shopping (e-hon, Maruzen-Junkudo online store), and physical bookstores such as Maruzen, Junkudo, and Bundo-do.

The honto Points service, usable across both online and physical stores, is now available at approximately 180 stores nationwide, including Keirindo Bookstore, Toda Bookstore (9 locations), and Hakodate Eikodo at Marui Imai Department Store.

As of May 2026, honto has surpassed 9.4 million members, supporting book lovers with its mission to provide 'the books you want to read, when you want to read them, in the format you want to read them.'

- Official Website of Hybrid Comprehensive Bookstore 'honto': https://honto.jp/

- X (formerly Twitter): https://X.com/honto_jp

＜Company Overview: Dai Nippon Printing Co., Ltd.＞

- Company Name: Dai Nippon Printing Co., Ltd. https://www.dnp.co.jp/

- President & CEO: Yoshisato Kitajima

- Address: 1-1 Ichigayakagamachi, Shinjuku-ku, Tokyo 162-8001

＜Company Overview: 2Dfacto, Inc.＞

- Company Name: 2Dfacto, Inc. https://www.2dfacto.co.jp/

- President & CEO: Kazumitsu Suzuki

- Shareholder: Dai Nippon Printing Co., Ltd.

- Address: 1-1 Ichigayakagamachi, Shinjuku-ku, Tokyo 162-8001