Rakuten Link Office is a social and communication app available on Android. Developed by Rakuten Group Inc., this free app offers unlimited calls and messages for Rakuten Mobile corporate cellular plan subscribers.

The core features of Rakuten Link Office include voice and video calls. Subscribers can make unlimited calls and send SMS to Rakuten Link users, as well as to other mobile networks and landline numbers in Japan. In addition to calls, the app also allows users to create chat groups with up to 100 people, where they can share photos, videos, and documents. Users can also send and receive SMS directly within the app.

One convenient feature of Rakuten Link Office is the ability to register and edit contacts in sync with the default address book on your phone. This ensures that your contacts are always up to date and easily accessible.

It's important to note that communication from Japan to overseas and from overseas to overseas is subject to pay-as-you-go billing by country/region. Additionally, emergency calls are not available when in overseas roaming areas. Usage charges, overseas roaming, and international calls and SMS service areas and provisions are subject to change without notice.

For more detailed information and support, users can refer to the provided links in Japanese. These links include an activation manual, a guide on how to use the app, FAQs, and a support request form.

Overall, Rakuten Link Office is a valuable app for Rakuten Mobile corporate subscribers, offering unlimited calls and messages within Japan and convenient communication features.