Compare AI chat services in Japanese
Updated
If you want to keep talking with the same companion, with memories that carry into later conversations, we at Atlas recommend Nekoyama-san. Start with how we build memory and everyday life into the experience, then compare platforms and pricing with Cotomo and LINE AI Friends.
Prepared by Atlas, the operator of Nekoyama-san, using each service’s official information.
Nekoyama-san
Remembering what you like and who matters to you
Nekoyama-san remembers preferences, dislikes, important people and feelings shared in conversation. Those memories inform replies when you return on another day.
At Atlas, we develop the underlying Atlas Memory system ourselves. Our work focuses on what to remember from a conversation and when to recall it, so you can keep talking with the same companion over time.
Read about Atlas Memory (Japanese) →Your Nekoyama-san has a life in the Garden
You meet one companion from a world called the Garden. Nekoyama-san shares things about its own life as well as listening to yours. You can also read its diaries and letters, getting to know each other through your everyday experiences.
Memory and text conversations are free
Memory powered by Atlas Memory is included in the free plan. Basic chat is free without a message limit. Pro costs ¥2,980/month for voice calls and the full diary and letter history.
Pricing and features checked: · Official FAQ: free chat, Pro and memory ↗
How other services differ
Cotomo lets you customize your own characters. LINE AI Friends is another option for meeting different characters on LINE. Here are their platforms and pricing, based on official information.
Cotomo
- Platform and conversation
- Text and voice conversations in the app and on the web.
- Choosing a character
- Customize a character’s name, icon, personality, speaking style, voice and remembered information.
- Free and paid features
- Simple mode is free; daily conversation and role-play modes are paid.
Official sources checked:
LINE AI Friends
- Platform and conversation
- Text conversations with characters inside LINE.
- Choosing a character
- Answer questions about your preferred world and character, then choose a suggested character; official characters are also available. Closeness and relationships change as conversations continue.
- Free and paid features
- Each exchange uses 1 Power or 1 LINE Coin. Free Power is available at registration and through daily check-ins.
Official sources checked:
Meet your Nekoyama-san
Add Nekoyama-san on LINE and follow the introduction to meet your companion. Start with something that happened today or a thought you wanted to share. Text conversations and memory are both included for free.