Mercenaire Co., Ltd. Releases "SHIEN Interview Trainer," a Free AI Interview Practice Tool for Job-Seeking Professionals
Mercenaire Co., Ltd. has publicly released "SHIEN Interview Trainer," a free AI interview practice tool for job-seeking professionals. In response to the growing adoption of AI in recruitment, the tool offers role-playing with an AI interviewer and customizable feedback to help candidates prepare.
📋 Article Processing Timeline
- 📰 Published: May 13, 2026 at 21:00
- 🔍 Collected: May 13, 2026 at 12:31
- 🤖 AI Analyzed: May 13, 2026 at 12:55 (23 min after Collected)
Mercenaire Co., Ltd. (Location: Chiyoda-ku, Tokyo; Representative Director: Ikkei Daidoji), which specializes in recruitment support, will publicly release "SHIEN Interview Trainer," an AI interview practice tool primarily for job-seeking professionals, starting today. This service is completely free to use.
SHIEN Interview Trainer
■ Background of Development — In an era of expanding AI recruitment, candidates' preparation is lagging
The rapid utilization of AI in corporate recruitment processes is increasing, and the number of companies adopting AI interview tools is also on the rise. This requires candidates to communicate logically at a higher level than ever before.
On the other hand, the environment for job-seeking professionals to conduct high-quality interview practice is not well-established. Especially for those in their late 20s to 30s who haven't had interview experience since graduating, it often creates anxiety, thinking, "It went well when I was a new graduate, but I'm not prepared enough for mid-career interviews."
Furthermore, asking friends for help can be awkward, and mock interviews with recruitment agents are limited in number. Securing practice time itself is difficult while employed. Many existing AI interview practice tools are designed for new graduates or merely evaluate spoken content unilaterally, without sufficiently addressing in-depth questioning or the differences in interviewer attributes unique to mid-career hiring.
In response to this situation, our company, based on our on-site knowledge as a recruitment agent, developed "a tool that allows job-seeking professionals to practice interviews with AI in a context relevant to actual interviews."
■ Service Features
1. "Role-play Mode" for in-depth dialogue with an AI interviewer
Instead of single-question evaluations, users practice in a dialogue format with an AI interviewer, involving 4-5 exchanges. The AI delves deeper based on the user's answers, allowing them to experience the tension and flow similar to a real interview.
Users can choose from three interviewer types: HR, On-site (Manager), and Executive, each with different questioning perspectives and in-depth probing approaches.
2. Freely customize interviewer tone and style
Users can select up to two from six presets such as "Pressuring," "Startup-style," or "Final interview-style," and also provide additional instructions in free text.
3. Visualize "how well you convey" with a 4-axis score
Answers are evaluated on a 1-5 point scale across four axes: "Clarity of conclusion, Logic, Structure, and Specificity." Designed based on the actual perspectives interviewers look for in behavioral interviews, it allows users to numerically grasp areas for improvement instead of just "practicing vaguely."
4. Instant generation of rephrasing examples
In addition to good points and areas for improvement, an improved version of the answer, leveraging the original content, is automatically generated. This clarifies "how to fix it" on the spot, ensuring a smooth transition from practice to application.
5. Voice recognition compatible and usable on smartphones
Voice recognition provides an environment for "practicing while speaking." This allows users to turn commuting time or lunch breaks while employed into practice time. Text input is also supported.
6. Optimization according to job type
It supports five job types: sales, engineering, marketing, and corporate, with different key evaluation axes and in-depth probing perspectives for each. Entering the desired company name customizes the questions to that company's context.
■ How to Use
・Access https://trainer.agent-shien.jp/ (no account registration required)
・Set interviewer type, custom settings, job type, and desired company (approx. 1 minute)
・Answer AI interviewer's questions by voice or text
・Receive 4-axis score evaluation feedback + rephrasing examples
Practice can start in as little as 3 minutes.
■ Pricing
Completely free
Limited to 3 sessions without login.
By registering a free account, the session limit increases to 10, and practice history can be saved.
■ Supported Environment
Browser: Google Chrome/Microsoft Edge (latest version recommended)
Devices: PC, smartphone, tablet
■ Future Development
This service is positioned as a useful tool for our recruitment support service "SHIEN." Going forward, we will expand our product development to support candidates in the AI era, beyond interview training.
Mercenaire Co., Ltd.
■ Company Overview
Mercenaire's vision is "a world where individuals can embrace their true selves and take on many challenges." We are a "continuously challenging" company that supports client companies in achieving their goals while also creating our own businesses. In addition to consulting services specializing in hands-on new business creation and strategy formulation, we are also engaged in developing our own businesses.
Established: January 2022
Representative: Representative Director Ikkei Daidoji
Address: 1-32 Kanda Suda-cho, Chiyoda-ku, Tokyo
URL: htt
SHIEN Interview Trainer
■ Background of Development — In an era of expanding AI recruitment, candidates' preparation is lagging
The rapid utilization of AI in corporate recruitment processes is increasing, and the number of companies adopting AI interview tools is also on the rise. This requires candidates to communicate logically at a higher level than ever before.
On the other hand, the environment for job-seeking professionals to conduct high-quality interview practice is not well-established. Especially for those in their late 20s to 30s who haven't had interview experience since graduating, it often creates anxiety, thinking, "It went well when I was a new graduate, but I'm not prepared enough for mid-career interviews."
Furthermore, asking friends for help can be awkward, and mock interviews with recruitment agents are limited in number. Securing practice time itself is difficult while employed. Many existing AI interview practice tools are designed for new graduates or merely evaluate spoken content unilaterally, without sufficiently addressing in-depth questioning or the differences in interviewer attributes unique to mid-career hiring.
In response to this situation, our company, based on our on-site knowledge as a recruitment agent, developed "a tool that allows job-seeking professionals to practice interviews with AI in a context relevant to actual interviews."
■ Service Features
1. "Role-play Mode" for in-depth dialogue with an AI interviewer
Instead of single-question evaluations, users practice in a dialogue format with an AI interviewer, involving 4-5 exchanges. The AI delves deeper based on the user's answers, allowing them to experience the tension and flow similar to a real interview.
Users can choose from three interviewer types: HR, On-site (Manager), and Executive, each with different questioning perspectives and in-depth probing approaches.
2. Freely customize interviewer tone and style
Users can select up to two from six presets such as "Pressuring," "Startup-style," or "Final interview-style," and also provide additional instructions in free text.
3. Visualize "how well you convey" with a 4-axis score
Answers are evaluated on a 1-5 point scale across four axes: "Clarity of conclusion, Logic, Structure, and Specificity." Designed based on the actual perspectives interviewers look for in behavioral interviews, it allows users to numerically grasp areas for improvement instead of just "practicing vaguely."
4. Instant generation of rephrasing examples
In addition to good points and areas for improvement, an improved version of the answer, leveraging the original content, is automatically generated. This clarifies "how to fix it" on the spot, ensuring a smooth transition from practice to application.
5. Voice recognition compatible and usable on smartphones
Voice recognition provides an environment for "practicing while speaking." This allows users to turn commuting time or lunch breaks while employed into practice time. Text input is also supported.
6. Optimization according to job type
It supports five job types: sales, engineering, marketing, and corporate, with different key evaluation axes and in-depth probing perspectives for each. Entering the desired company name customizes the questions to that company's context.
■ How to Use
・Access https://trainer.agent-shien.jp/ (no account registration required)
・Set interviewer type, custom settings, job type, and desired company (approx. 1 minute)
・Answer AI interviewer's questions by voice or text
・Receive 4-axis score evaluation feedback + rephrasing examples
Practice can start in as little as 3 minutes.
■ Pricing
Completely free
Limited to 3 sessions without login.
By registering a free account, the session limit increases to 10, and practice history can be saved.
■ Supported Environment
Browser: Google Chrome/Microsoft Edge (latest version recommended)
Devices: PC, smartphone, tablet
■ Future Development
This service is positioned as a useful tool for our recruitment support service "SHIEN." Going forward, we will expand our product development to support candidates in the AI era, beyond interview training.
Mercenaire Co., Ltd.
■ Company Overview
Mercenaire's vision is "a world where individuals can embrace their true selves and take on many challenges." We are a "continuously challenging" company that supports client companies in achieving their goals while also creating our own businesses. In addition to consulting services specializing in hands-on new business creation and strategy formulation, we are also engaged in developing our own businesses.
Established: January 2022
Representative: Representative Director Ikkei Daidoji
Address: 1-32 Kanda Suda-cho, Chiyoda-ku, Tokyo
URL: htt