ARu - Decode Japan
Someone's Always Close By.
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Whether you live in Japan or you're just visiting.
Everyday life in Japan is full of unspoken rules no one tells you about, and little "wait, how do I do this?" moments that pop up all the time.
ARu is your everyday guide to living and traveling in Japan, made for foreigners.
Ask anything. Get answers fast. Understand the why.
■ Japan, more fascinating
Stuck? Ask the AI anything about life in Japan. Ask in your own words and get a clear, easy answer right away.
■ Not sure? Just ask ARu
"Can I slurp ramen?" "What's a My Number card?" — hundreds of real questions covering daily life, travel, food, etiquette, and even emergencies.
■ Turn "huh?" into "ah, I see"
ARu doesn't just tell you the rules. It explains the reason behind them, so things finally click.
■ The more you know, the more you'll love Japan
Go deeper with in-depth articles and timely info — from traditional culture like tea ceremony, martial arts, and calligraphy, to the manners and topics worth knowing right now.
■ Your own Japan begins here
Connect directly with experienced locals and Japanese mentors who've walked the same path, and ask them anything. Residence card paperwork, your first train ride, onsen etiquette — with ARu, living and traveling in Japan becomes something you can truly relax and enjoy.
Welcome to Japan.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ARu Terms of Service: https://aarulink.com/terms-of-service
Privacy Policy: https://aarulink.com/privacy-policy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
We’ve improved the chat experience.
• Profile photos now load faster.
• Read receipts now show when the other side has read your messages.
The developer, R-あアル合同会社, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- R-AARU LLC
- Size
- 36.1 MB
- Category
- Travel
- Compatibility
Requires iOS 26.1 or later.
- iPhone
Requires iOS 26.1 or later. - Mac
Requires macOS 26.1 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.1 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- ARu Pro 買い切り $119.99
- ARu Pro 年額 $59.99
- ARu Pro (Monthly) $5.99
- Copyright
- © 2026 合同会社R-あアル