Hisanori Yoshida and Voice Actors Explore the "Value of Voice" in New Program "Koetowa," Starting April 3, 2026 — Sponsored by VoiStock —

Radio Osaka will begin broadcasting a new program, "Koetowa," starting Friday, April 3, 2026.

Hosted by announcer Hisanori Yoshida, this program will welcome voice actors as guests to explore the "value of voice" from multiple perspectives.

Believing in the potential of voice and with respect for voice actors, we present this new endeavor that directly confronts the question, "What constitutes a valuable voice?"

MC Hisanori Yoshida (left) and first guest Yuki Kaji (right)

First Guest: Yuki Kaji

The first broadcast will feature voice actor Yuki Kaji, known for roles such as Eren Yeager in "Attack on Titan." In addition to in-depth discussions about his thoughts on "voice," a segment scientifically analyzing Mr. Kaji's voice is also planned.

Guest: Yuki Kaji

Born on September 3. Debuted as a voice actor in 2004.

He has voiced numerous characters in popular works, including Eren Yeager in "Attack on Titan," Jet-senpai in "Detective Precure!", Mao in "MAO," Shoto Todoroki in "My Hero Academia," Kenma Kozume in "Haikyu!!," Akuma-kun/Ichiro Umoregi in "Akuma-kun," and Meliodas in "The Seven Deadly Sins." He also handles numerous narrations for programs like Nippon TV's "1 Oku-nin no Daishitsumon!? Waratte Koraete!", the voice of Mizuho's official character "Aomaru," and the sound logo for "IRIS OHYAMA."

In 2013, he became the first person in history to win the Seiyu Awards Best Lead Actor for two consecutive years. In 2018, he published his book "Itsuka Subete ga Kimi no Chikara ni Naru" (Someday Everything Will Be Your Strength), which sold over 70,000 copies. He has expanded his activities to include starring in live-action productions, stage plays, recitation dramas, and various production roles. His voice possesses the "1/f fluctuation" resonance, which is said to have a healing effect on the human brain and mind.

To commemorate his 20th anniversary as a voice actor, he launched the AI voice synthesis project [Soyogi Fractal].

https://www.soyogi-fractal.com

MC: Hisanori Yoshida

Born in Tokyo in 1975. Graduated from Keio University, Faculty of Letters. Announcer. Received the 49th Galaxy Award DJ Personality Award in 2012.

In addition to regular radio programs, he appears in about 200 TV programs and events annually as an MC. He is well-versed in manga, anime, idols, and digital fields, and is also the founder of the "Manga Taisho" award. Based on his self-proclaimed experience as a "former communication-challenged person," he gives numerous lectures on communication.

He started his activities as a VTuber in 2019. As virtual announcer "Issho Ken," he hosts VR events and also has expertise in VR business, expanding his activities beyond the scope of a traditional announcer.

He has published 15 books (including co-authored works). His book "Naze, Kono Hito to Hanasu to Raku ni Naru no ka" (Why is it so easy to talk to this person?) (Ohta Publishing) has sold 135,000 copies domestically and 30,000 copies in Thailand. In February 2025, he will publish "Nani mo Mottenai noni, Nande Shiawase nan desu ka? Jinruigaku ga Oshietekureru, Jiyu de Raku na Ikikata" (Why are you happy even though you have nothing? Anthropology teaches us a free and easy way of life) (Akishobo) co-authored with anthropologist Katsumi Okuno (Rikkyo University).

New Program "Koetowa" Exploring the "Value of Voice"

【Program Concept】

Normally, many people casually utter and casually hear "voices." Recently, with AI making it easy to generate voices, we live in a convenient era, but there is definitely something different between a voice generated by AI and a "voice" produced by a human using their body, mind, and emotions. We may unconsciously distinguish "valuable voices."

So, what exactly is the "value of voice"? Is it convenience or emotion, context or pronunciation, natural talent or effort, or something else...? We have planned an experimental program that will delve into the value and potential of "voice" with guests, challenging ourselves to articulate answers to this open-ended question.

The program name "Koetowa" (コエトワ) encompasses the question "Koe to wa?" (What is voice?), the idea that voice has eternal value, and the compound meaning of "Koe to Wa" (Voice and Talk).

【Program Overview】

Program Name: Koetowa

Broadcaster: Radio Osaka

Broadcast Time: Every Friday 22:00〜23:00 (Starts April 3, 2026)

Cast: MC Hisanori Yoshida, Voice Actor Guests, etc.

Sponsor: VoiStock Pte. Ltd.

*In addition to Radio Osaka (FM91.9, AM1314), the program can be listened to via radiko (nationwide for one week after broadcast) and on the official YouTube channel.

【Official Program SNS Accounts】

Official YouTube Channel: https://www.youtube.com/@koetowa

Official X: https://x.com/koetowa_radio

Official TikTok: https://www.tiktok.com/@koetowa_radio

About VoiStock

VoiStock Pte. Ltd., headquartered in Singapore, aims to create new services and value utilizing voice, with the vision of "Connecting the world with voice and technology." Developed and operated services include "Oshi-tabi" (JR Central) and "Koe-tabi." https://www.about.voistock.com/

"Oshi-tabi" (JR Central)

A service that allows users to enjoy exclusive audio content from artists and popular characters while riding the Tokaido Shinkansen. https://recommend.jr-central.co.jp/oshi-tabi/

"Koe-tabi"

A service that conveys and supports Japanese culture with valuable voices, starting with official audio guides for Kofukuji Temple and Yakushiji Temple in Nara, narrated by voice actors Masako Nozawa and Hina Yomiya. https://koe-tabi.com/

Inquiries

Please send your opinions, impressions, and inquiries regarding appearances to the address below.

We are also looking for themes and questions related to "voice" that you would like us to feature on the program.

koetowa@obc1314.com

【Radio Osaka Official Website】　https://www.obc1314.co.jp/