Introducing "PerfectVoice" Speech Recognition Engine
June 8, 2025

Thank you for your continued use of the AI transcription service "Mojiokoshi-san."
To further enhance the quality of our service, we, Mojiokoshi-san, have introduced "PerfectVoice" as a new speech recognition engine.
Features of PerfectVoice
1. Highest Accuracy Transcription
Achieve even higher accuracy in your transcriptions than before.
2. Sentence-Unit Subtitle File Creation
Unlike AmiVoice, which previously created subtitles word-by-word (like word segmentation), PerfectVoice now creates subtitle files on a sentence-by-sentence basis.
3. Transcribe Dozens of Minutes of Audio in About 10 Minutes
PerfectVoice allows for transcription in even less time than the previously used AmiVoice and Google engines.
4. Supports 100 Languages
It supports 100 languages, including Japanese and English, for multilingual transcription.
*If the audio contains speech in languages other than the selected language, it may be translated.
These features enable more accurate and faster transcription of audio, video, images, and PDFs from an even wider range of scenarios.
AmiVoice Will Continue to Be Offered
The "AmiVoice" speech recognition engine, which we have provided until now, will continue to be available for your use.
AmiVoice has a "speaker separation function" that PerfectVoice does not, allowing you to transcribe by speaker when there are multiple speakers, such as in meeting minutes.
Regarding subtitle creation, while it requires editing as it's created word by word, it allows for the creation of subtitles that better align with the intended phrasing and sentence breaks.
By using PerfectVoice and AmiVoice strategically, you can make your transcription process even more convenient.
Please continue to use AmiVoice as you always have.
Google Speech Recognition Engine Discontinued
The use of the Google speech recognition engine, which was previously offered, ended on December 31, 2023.
Please refer to this article for more details:
Regarding the Discontinuation of the Google Speech Recognition Engine
Please Try Our New Speech Recognition Engine "PerfectVoice"
We, Mojiokoshi-san, will continue to strive for further service improvements.
We kindly ask for your continued support and patronage.
■ 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