What is Rimo Voice? Top AI Transcription Service for Japanese Explained!
June 8, 2025


AI transcription services make it easy to convert meetings, online events, and conferences into text.
Rimo Voice is one such convenient AI transcription service.
A key feature of Rimo Voice is that it's an AI transcription service developed in Japan, specifically optimized for the Japanese language.
While there are many services, apps, and websites that use AI speech recognition for transcription, a significant number of them are international services, with only a minority provided by Japanese companies.
Since this AI transcription service is provided within Japan, you can feel secure regarding data security.
This article will introduce Rimo Voice, an AI transcription service, detailing its features and functionalities!
We will also introduce recommended AI transcription services available in Japan that can transcribe Japanese, so please use this as a reference when using AI transcription services for work, study, or hobbies.
【Reliable as it's a Japanese Company】Recommended AI Transcription Services
There's a highly recommended service for automatic transcription using AI!
That's the AI transcription service, "Mojiokoshi-san."
When looking for a service to transcribe meeting or discussion content, many people are concerned about security.
In that regard, "Mojiokoshi-san" is an AI transcription service operated by a Japanese company, so you can feel secure when handling important information.
Of course, its transcription accuracy and processing speed are also outstanding!
Anyone can easily transcribe using its high-performance AI.
Convenient Transcription with Two High-Performance AIs
The AI speech recognition engines available in "Mojiokoshi-san" each have distinct features:
- PerfectVoice: Transcribes long audio in just 10 minutes. Supports Japanese and 100 other languages.
- AmiVoice: Speaker diarization (transcribes meetings by separating speakers). Transcribes in about the same time as the audio file length.
These features allow for speedy and highly accurate transcription of audio with multiple speakers or specialized terminology.
What's more, "Mojiokoshi-san" allows you to transcribe up to 1 minute of audio for free without registration or login!
If you're looking for an AI transcription service, why not try "Mojiokoshi-san" for free first?
What is Rimo Voice?
One of the AI transcription services is Rimo Voice.
What exactly are its features?
Service for Transcribing Japanese
Rimo Voice is an AI transcription service that can transcribe audio and video.
It can convert audio and video into text in various situations, such as meetings and online events.
The biggest feature of Rimo Voice is that it is an AI transcription service specialized for the Japanese language.
While there are many services that use AI speech recognition for transcription,
While many services exist, even those provided by Japanese companies typically offer English transcription as well.
Services like Rimo Voice, which are completely specialized in Japanese, are rare.
Transcription by Simply Uploading Files
Rimo Voice transcribes by uploading recorded files.
Transcription begins simply by uploading audio or video files from meetings, discussions, or online events to Rimo Voice.
You can also transcribe on the spot using the microphone function.
Recommended File Formats are M4A and MP4
When uploading files to Rimo Voice, pay attention to the file format.
The recommended file formats are M4A files (audio) and MP4 files (video).
Common audio file formats like MP3 and WAV are not recommended.
M4A is the file format used when recording voice memos on iPhone or iPad, so recording with an iPhone or iPad (iOS) allows for smooth usage.
Note that when I actually tried uploading an MP3 file and transcribing it, it worked without any issues.
Admin Panel Includes Player and Summary Functions
The transcribed results can be checked on the Rimo Voice admin panel.
The admin panel also allows you to play back the uploaded audio.
It features a function where selecting text from the transcription results plays back the corresponding audio segment.
Additionally, a content summarization feature using ChatGPT is available.
Pricing Differs for Personal and Business Plans
Rimo Voice offers different plans for individuals and businesses.
Personal Plan
Rimo Voice's personal plan is based on usage time.
- Audio files: 22 yen/30 seconds (includes 60 minutes free trial)
- Videos: 33 yen/30 seconds
This calculates to:
- 1 hour audio file: 2,640 yen
- 1 hour video file: 3,960 yen
Please note.
Beware: Fractions of Free Trial Time are Rounded Up to 1 Minute
This time, I tried uploading an MP3 file that was 1 minute and 1 second (61 seconds) long, and
The remaining free trial time became 58 minutes.
Fractions of a minute less than 1 minute are rounded up to 1 minute, so be aware of this.
Business Plans
Rimo Voice offers four types of business plans.
- Trial: 30,000 yen・10 hours/month (video not supported)
- Light: 60,000 yen・20 hours/month
- Basic: 120,000 yen・45 hours/month
- Business: Quote required, 100+ hours/month
Please note that video transcription is not available in the Trial plan.
Also, for business use, an initial fee (account issuance fee) equivalent to one month's subscription is required.
Rimo Voice is a Service Used by Many Businesses
Rimo Voice, an AI transcription service specializing in Japanese, is utilized by many businesses.
When you need to transcribe Japanese audio or video for creating meeting minutes or transcribing interviews, Rimo Voice allows for smooth and efficient transcription.
Recommended AI Transcription Services for Japanese
Besides Rimo Voice, there are other services that can smoothly transcribe Japanese audio and video, similar to this AI transcription service specialized in Japanese!
【Recommended for Japanese Transcription】Mojiokoshi-san
For transcribing Japanese audio and video, the recommended AI transcription service is "Mojiokoshi-san".
Mojiokoshi-san is a high-performance AI transcription service that uses the latest AI speech recognition engine.
Since it's an AI transcription service operated by a Japanese company, its Japanese recognition accuracy is outstanding!
It can accurately transcribe audio, video, image, and PDF files in just 10 minutes.
As a service originating from Japan, it's also recommended for those who prioritize security.
Convenient and Smooth Transcription with Two AI Engines
Mojiokoshi-san allows you to use two types of the latest AI engines!
Each has the following features:
- PerfectVoice: Transcribes long files in just 10 minutes, supports 100 languages including Japanese and English.
- AmiVoice: Includes speaker diarization, transcribes in approximately the same time as the audio length.
If you need transcribed text quickly, processing is completed in just 10 minutes!
Of course, like Rimo Voice, speaker diarization (transcribing each speaker separately) is also possible, making meeting minute creation very smooth.
Furthermore, while Mojiokoshi-san boasts excellent Japanese transcription accuracy, it can also transcribe foreign languages with similar high accuracy!
It's a great value service that offers diverse uses with just one registration.
Supports Many File Formats
While some AI transcription services have limited supported/recommended file formats, Mojiokoshi-san supports many file types, eliminating the need to convert file formats or extract audio from video files!
Supported formats include:
- Audio: .mp3 .wav .wma .m4a .aifc .flac .aac .aiff .aifc
- Video: .mp4 .mov .avi .flv .mkv .webm .wmv .3gp
- Image: .jpg .jpeg .png .webp .avif .tiff
- Document: .pdf
With support for a wide range of file formats, you can simply upload files saved on any smartphone, IC recorder, or camera!
Easy Operation: Just Upload from the Top Page
Mojiokoshi-san is also easy to use.
Just open the top page, select a file, and upload it.
The processing will then happen automatically, and the transcription results will be displayed.
Clear Pricing Plans! Free to Use!
Mojiokoshi-san's pricing plans are divided into 3 tiers:
- Basic Plan: 1,000 yen/month (4 hours audio, 500 images)
- Value Plan: 2,000 yen/month (10 hours audio, 1,200 images)
- Premium Plan: 3,000 yen/month (20 hours audio, 3,000 images)
There's no distinction between individual and corporate users, making it very affordable.
What's more, Mojiokoshi-san can be used for free!
You can transcribe files up to 1 minute for free without registration or login, making it easy to try out AI-powered transcription.
You can try it right now.
If you're wondering how to transcribe, why not try "Mojiokoshi-san"?
AI Transcription Services are Recommended for Japanese Transcription
When transcribing Japanese audio or video files into text, it's highly recommended to use AI transcription services like Rimo Voice or "Mojiokoshi-san."
By using Rimo Voice, which specializes in Japanese, or "Mojiokoshi-san," which offers high-accuracy and speedy transcription with diverse features, you can conveniently convert audio and video into text. If you're unsure about transcription methods, why not start by trying an AI transcription service?
When choosing an AI transcription service, it's best to start with a free service like "Mojiokoshi-san."
For transcribing meetings, discussions, or online events, using an AI transcription service is recommended as it allows for quick and easy processing.
■ AI transcription service "Mr. Transscription"
"Mr. Transcription" is an online transcription tool that can be used from zero initial cost and 1,000 yen per month (* free version available).
- Supports more than 20 file formats such as audio, video, and images
- Can be used from both PC and smartphone
- Supports technical terms such as medical care, IT, and long-term care
- Supports creation of subtitle files and speaker separation
- Supports transcription in approximately 100 languages including English, Chinese, Japanese, Korean, German, French, Italian, etc.
To use it, just upload the audio file from the site. Transcription text is available in seconds to tens of minutes.
You can use it for free if you transcribe it for up to 10 minutes, so please try it once.
Email: mojiokoshi3.com@gmail.com
Transcription for audio / video / image transcription. It is a transcription service that anyone can use for free without installation.
- What is Mr. Transcription?
- Transcript images, sounds, and videos with Mr. Transcription
- Free registration
- Rate plan
- manual