Eiji Otsuka Books

Kanjokasuru shakai

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Social critic, anthropologist and novelist, Ōtsuka has pioneered research on otaku sub-cultures in modern Japan. This group of essays explores ideas in modern literary criticism through topics of...

Nihon taishu bunkaron ansoroji

By Eiji Otsuka, Shingo Ito, Akiko Sano, Chikara Uchida

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Eto Jun to shojo feminizumuteki sengo : sabukarucha bungakuron josho

By Eiji Otsuka

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.