Change Language In Fujitsu F04j - Docomo Full

The Fujitsu F-04J, released by NTT Docomo, is a Japanese domestic model. Because it was manufactured primarily for the Japanese market, finding the language settings can be intimidating if you cannot read Japanese (Kanji, Hiragana, or Katakana).

There are two main scenarios you might face:

Here is how to handle both.

Changing the system language does not automatically change your keyboard. The default Fujitsu keyboard (Shutter key keyboard or touch keyboard) might still predict Japanese words.

To fix this:

For physical keyboard users (if you slide open the F-04J): change language in fujitsu f04j docomo full

Before you start tapping blindly through menus, it is crucial to manage expectations.

The Fujitsu F-04J runs Android 7.1.1 Nougat (or later, depending on updates). Android, by nature, supports dozens of languages. However, docomo (the carrier) and Fujitsu often restrict the visible list to Japanese only. Do not panic. The language files for English (US/UK), Chinese, and often Korean are still present on the phone. You just need to access them.

Confirmed supported languages on F-04J:

Note: European languages like French, German, or Italian are generally NOT available on Japanese domestic models.

Many users confuse system language with typing language. You can easily type in any language using the Google Keyboard (Gboard). The Fujitsu F-04J, released by NTT Docomo, is

How to add a full keyboard language:

This works 100% for any language. You can type emails, SMS, and chats in any script, even if the phone menus are in Japanese or English.

Japanese carrier phones often remove all languages except Japanese and English. To use another language (e.g., Spanish, French, Chinese):

  • Option B – ADB command

  • Option C – Root + custom locale enabler
    Rooting the F‑04J is difficult and voids warranty, plus it may break docomo’s original features (Osaifu‑Keitai, 1Seg). Not recommended for most users. Here is how to handle both

    • If you went through the settings and only saw "日本語" (Japanese) with no option to add English, your phone is running the strict Japanese Domestic ROM. You cannot simply "switch" it without third-party tools.

    The standard workaround for this is an app called MoreLocale 2.

    Step 1: Install the App

    Step 2: Grant Permissions (The Tricky Part)

  • If you do not have a PC: Some versions of this phone may allow you to grant permission through the phone’s security settings, but typically ADB is required for Docomo phones.

    • Step 3: Change the Language

    Note: This changes the system language for apps that support it, but some deep-level Docomo carrier apps (like the Docomo mail or docomo App market) may remain in Japanese.