Establishing a system that leads to improved satisfaction for customers and staff by introducing Ondoku! Case study introduction of Adire Legal Professional Corporation
Jan. 26, 2026
- Adire Law Office
- Size: Over 1,100 employees / Over 220 lawyers (As of October 31, 2023)
- Industry: Law Office
- Interview: Lawyer Kazumasa Hata (Member of the Tokyo Bar Association)
: Human Resources Department, Mr. Yasuda
Objectives / Challenges
Used for narration in contract explanation videos and employee training materials. Preparation for high-quality production and the process of recording human voices takes an enormous amount of time and effort.
Solution
Abolish in-office voice recording and create narration using Ondoku.
Results
Significant time savings by eliminating the need for detailed script preparation and re-recording voices.
Contributed to operational efficiency by utilizing the created videos in various locations.
Company and Implementation Department Introduction

Lawyer Mr. Hata (hereinafter, Hata): We are a comprehensive law office that primarily handles personal issues such as debt problems, domestic troubles, and claims for national benefits related to Hepatitis B.
Traditional law offices often feel unapproachable and require courage to consult. We continue our activities with the goal of being a "closely accessible law office" to change that situation.
For example, one of our strengths is running approachable advertisements and having systems in place for easy consultation over the phone. We also strive to provide explanations without using technical terms as much as possible, focusing on making lawyers feel more accessible.
HP: Adire Law Office
Please tell us the background behind implementing a text-to-speech tool.

Hata: Currently, we provide explanations from our office to clients not only orally or in writing but also through videos. Previously, it was only oral or written, but as a result of pursuing clarity, we felt it was important to provide videos with illustrations and movement.
To create high-quality videos, we must also focus on narration. However, even when recording with staff voices, re-recordings occurred many times, taking up an enormous amount of time.
Furthermore, from the perspective of the recording environment, external sounds such as phone rings or footsteps are unavoidable problems no matter how careful we are.
As a result, it took significant effort and time to create a video.
Mr. Yasuda, Human Resources Department (hereinafter, Yasuda): In the HR department, every time we held an orientation for new hires, we spent half a day giving the same explanation. This led us to think that playing a video that can be clearly understood, even without a human explanation, would lead to operational efficiency.
I felt that a text-to-speech tool that could easily generate narration would allow us to take the step toward video creation, which led to the implementation.
Could you tell us about the process that led to the implementation of Ondoku?

Hata: The low price and ease of use were the deciding factors.
Specifically, regarding ease of use, we appreciated the intuitive interface. The text box and download labels are clear, so there is no confusion when using it.
Additionally, since we create materials for clients, the fact that commercial use was allowed was an essential point. I decided on the implementation believing that Ondoku, which can be used smoothly, would solve the problem of voice recording taking an enormous amount of time.
Have the challenges been resolved (improved) compared to before implementing Ondoku?

Hata: Previously, recording voices for a video material of about 10 minutes could take around 6 hours.
I think it took 3 hours just to write a script designed so the staff recording it could read it without hesitation. This was because we needed a perfect script to succeed in recording in one go. To maintain quality at a word-for-word level, I checked it out loud many times.
Also, since we were very strict, such as re-recording if even a tiny external sound was captured, time was consumed rapidly.
However, now narration work is completed in about an hour and a half. The fact that human voices are no longer needed means detailed scripts are unnecessary, and the effort of re-recording has decreased significantly.
Yasuda: The start of video creation within the HR department was triggered by the introduction of Ondoku. Until then, the hurdle for making videos was so high that it was difficult to actually start.
Orientations for new hires are conducted for both new graduates and mid-career recruits, so it's not uncommon for them to be held about 10 times a month. At the time, the HR department had to be constantly present to provide explanations.
To improve operations, we tried incorporating videos with narration created by Ondoku into the training. We found that the level of understanding was equal to oral explanations, allowing HR staff to use their time for tasks other than orientations.
Have you received any feedback regarding Ondoku within the office?

Yasuda: There have been comments that the realization of video materials has made it possible to review orientation content at any time.
We make the explanation videos for new hires using Ondoku available through shared data so they can be reviewed at any time. Thanks to this, we have realized a system where parts that cannot be remembered through text alone can be easily relearned through video.
Furthermore, staff assigned to branches nationwide are able to progress their learning efficiently through video sharing from the headquarters.
If you have any further requests for improvement for Ondoku, please let us know.
Yasuda: I think it would be even easier to use if fine intonation could be improved. Especially when creating long sentences, we have to use techniques like cutting sentences short until they sound as intended.
Hata: I thought it would be even more convenient if there were something like an easy-to-understand manual. Currently, we are in a state of trial and error to create audio that sounds natural.
If Ondoku could provide something that explains tips for usage, we might be able to find time to focus on the intonation of technical terms.
How do you plan to use Ondoku in the future?
Hata: I hope to utilize Ondoku for strengthening education-related programs.
For example, something where you choose the correct answer from options and progress like an RPG. If there were training that could be practiced like a game, people could learn while having fun.
However, narration would be an important element for that, so I hope Ondoku will play an active role then.
Yasuda: In the HR department, we plan to upload videos to social media that job seekers, including new graduates, can easily view. I want Ondoku to solve all the narration issues that arise in those cases.


■ AI voice synthesis software "Ondoku"
"Ondoku" is an online text-to-speech tool that can be used with no initial costs.
- Supports approximately 50 languages, including Japanese, English, Chinese, Korean, Spanish, French, and German
- Available from both PC and smartphone
- Suitable for business, education, entertainment, etc.
- No installation required, can be used immediately from your browser
- Supports reading from images
To use it, simply enter text or upload a file on the site. A natural-sounding audio file will be generated within seconds. You can use voice synthesis up to 5,000 characters for free, so please give it a try.
Email: ondoku3.com@gmail.com
"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free