Top 4 Popular Diary Apps in Japan

Writing a diary is a valuable time for reflecting on daily events and thoughts while facing oneself. Many smartphone apps allow users to keep a diary in this busy modern world, gaining popularity among many. In Japan, diary apps with simple interfaces and robust privacy protection are particularly popular. This article introduces the top 5 most popular diary apps in Japan as of 2024, based on data comparing their features and scores. These apps are designed with features that make daily journaling enjoyable. By finding a diary app that fits your lifestyle, you can deeply record daily events and cherish your memories. Let’s explore each popular diary app in Japan.
▼ Popular Diary App Ranking
- Simple Diary
- Bullet Point Diary App
- Low-key Handy Diary
- Diary with Lock: Diary Journal
1. Simple Diary

Image Source: Simple Diary
As the name suggests, "Simple Diary" features a minimalist design with no unnecessary features. Its easy operation makes it especially popular among beginners. You can easily write entries by date, making it easy to continue recording daily events and feelings. Customization options for theme colors, app icons, and fonts are available. Tagging with favorite words allows an easy search of past entries. It also has essential features like a passcode lock and backup for privacy protection.
2. Bullet Point Diary App

Image Source: Bullet Point Diary
This app is perfect for those who want to summarize daily events concisely. It allows you to easily record daily events and thoughts in bullet points, making it ideal for busy people. Even those who struggle with writing can easily jot down short notes. Features include easy search of past entries and visual analysis with graphs, appealing to users who want to analyze their records.
3. Low-Key Handy Diary

Image Source: Low-Key Handy Diary
Low-Key Handy Diary appears simple but is packed with useful features. It balances ease of writing and functionality for long-term use. The rich calendar feature helps organize daily records by date. You can also attach photos, preserving memories visually. With no character limit, it’s perfect for detailed journaling. Its balance of usability and functionality makes it a trusted tool for many users.
4. Diary with Lock: Diary Journal

Image Source: Diary Journal
This app offers a design that feels like a paper diary. Its retro, warm design provides a calming writing experience. Privacy is protected with pattern locks, PINs, and fingerprint locks. Customizable fonts and layouts add to its appeal. Archive features and hashtag organization make reviewing past entries easy. It’s well-received by those familiar with traditional paper diaries.
Conclusion
These popular diary apps in Japan each offer unique features that make journaling enjoyable and convenient. From simple functions to rich customization and emotion-focused records, there’s something for everyone. Choosing an app that suits your lifestyle is important. The "Bullet Point Diary App" or "Simple Diary" is ideal for quick daily records. For a paper feel, the "Diary with Lock: Diary Journal" or "Low-Key Handy Diary" is perfect. Find the app that fits you and enjoy recording your daily life, preserving precious memories, and reflecting on your days.