Japanese IO is a Chrome extension that works in conjunction with the Japanese IO website to provide users with easy access to dictionary lookups, readings, kanji, and example sentences. This extension is designed to assist users in reading Japanese web pages.

To use Japanese IO, users need to create a free account on the website. Once the extension is installed, users can access dictionary lookups, readings, kanji, and example sentences directly from their Chrome browser. Additionally, word lookups are stored in the user's profile, allowing them to review and study the vocabulary on the Japanese IO website.

It's worth noting that Japanese IO offers paid feature upgrades for users who want to enhance their language learning experience. With its comprehensive features and integration with the Japanese IO website, Japanese IO is a valuable tool for anyone looking to read Japanese text more effectively.