About about our team

Passion

The ultimate podcast recording experience brought to you by PROPO.FM

What we aim to offer our clients is not just expertise in podcast production.
The journey leading up to the release of a podcast episode involves various stages, from crafting a concept that embodies the message for listeners, assigning the right guest, to meticulously preparing the script.

The recording day comes after a culmination of detailed processes.
The conversations shared among the participants.
The exhilaration of stumbling upon a unique story that can only arise from that specific day, moment, and place.

Podcasting captures the intersection of the participants' life stories and a continuous timeline before and after that intersection.
These dialogues emanate an otherworldly feel, possessing a captivating power that uplifts the spirits of those present during the recording. It becomes an irreplaceable experience, etched in the memories of everyone involved.

PROPO.FM has been by your side, ensuring clients deepen their attachment to their podcast productions through such experiences.
Especially, branded podcast recordings provide a platform for company representatives can engage in dialogue with activists who are making an impact in the world.
The "encounters, discoveries, inspirations, and conversations" born from podcast recordings breathe new life into the hearts of those involved in production.

We believe that podcast recording is a special time, brimming with potential beyond just creating an episode.

To let as many people as possible feel this potential, PROPO.FM is committed to delivering the best podcast recording experience.

For everyone involved in podcast production, to ensure that the space of podcast recording becomes even more splendid, PROPO.FM will pour all its energy into co-creating podcasts with our clients.

Best regards,
The PROPO.FM Production Team

ClientsWe Work With

Download Company Brochure

Member PROPO.FM Team Members

曽志崎 寛人

Submarine LLC CEO

Hiroto Soshizaki

曽志崎 寛人

Hello. I'm Hiroto Soshizaki, the representative of PROPO.FM.

PROPO.FM offers podcast production support services for businesses, based on my personal experience as a podcaster operating a program called "Rajireki - Radio Historical Tales."

From 2017 to the present, I have produced over 1000 episodes of "Rajireki." Now it ranks in the Top 3 in the podcast history category, with monthly playback exceeding 60,000 times. However, around 2018, a year after the start of the program, there were days when it was not played even once.

My experience of facing numerous challenges through "Rajireki" until today is condensed into the service known as PROPO.FM.

Since 2020, our company has been supporting the production of various corporations, including global companies such as NIKE and NN Life Insurance Company.

The entire PROPO.FM team would be honored to assist in your podcast production considerations. Please feel free to contact us at any time.

Other Members

Our team is comprised of diverse members from various regions, ages, careers, and backgrounds, each bringing their expertise in podcast production.

  • CTO

    Junichi Takahashi

    高橋 純一

  • 山田 蕗子

    Chief Designer

    Fukiko Yamada

    山田 蕗子

  • 河上 光

    Movie Designer

    Hikaru Kawakami

    河上 光

  • 山田 好美

    Chief Writer/Designer

    Yoshimi Yamada

    山田 好美

  • 長井 まど香

    Engineer

    Madoka Nagai

    長井 まど香

  • 石本 優

    Writer

    Yuu Ishimoto

    石本 優

  • 伊賀 弓

    Illustrator/Director

    Yumi Iga

    伊賀 弓

  • 赤池 澄子

    Designer

    Sumiko Akaike

    赤池 澄子

  • 新井 翔

    MC & Producer

    Sho Arai

    新井 翔

  • 関根 泰葉

    Operation Designer

    Yasuha Sekine

    関根 泰葉

  • 原 知也

    Sound Designer

    Tomoya Hara

    原 知也

  • 原 知也

    Data Engineer

    Junshiro Nishi

    西 潤史郎

Company Company Profile

Company
Submarine LLC.
Representative
Hiroto Soshizaki
URL
https://submarine-c.com/
Year founded
January 2018
Address
Shinjuku Washington Hotel Building 2F,
3-2-9 Nishi-Shinjuku, Shinjyuku-ku, Tokyo
160-8336 Japan
Business details
Podcast/audio content production, Web marketing production, Web creative production