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Working with the Sheraton Hotel, Overland Park Convention Center, and the City of Overland Park, it was decided to not hold Naka-Kon 2020 the weekend of March 13-15, 2020.

Due to scheduling constraints, we have decided rather than postpone until later to instead cancel Naka-Kon 2020, and concentrate our efforts on developing Naka-Kon 2021. This decision is based on the information we have regarding logistics and availability of our facilities.

This decision was very difficult to make, but we feel is the best course of action for continuing our mission of providing a quality celebration of Japanese popular culture.

If you have questions or concerns, please contact

However, due to the extenuating circumstances presented by the current COVID-19 outbreak, we are waiving our refund policy. We are also providing the option of rolling 2020 Memberships over to the 2021 convention in lieu of a refund. Please complete this form to let us know what you wish to do. If no reply to the form is given by March 27, 2020, then purchased badges will be automatically deferred and valid for Naka-Kon 2021. Badge refunds will start processing shortly but please be aware that due to the number of refunds involved it will likely be a couple weeks before all refunds are processed.

We appreciate your support for Naka-Kon and we will see you in 2021!

Chiaki Mayumura

Convention Year:
Chiaki Mayumura

Born September 12, 1996 in Tokyo Prefecture.

Chiaki Mayumura is a Japanese idol, singer-songwriter, guitarist, track maker, and the charismatic founder and CEO of the company Kaishaja Naimon Co., Ltd. In her free time, she enjoys picking up trash and living like a manga character. Her goal is to have a number one hit single on the American Billboard charts. One of Mayumura-san’s specialties is to improvise and sing on the spot. Along with her high-quality singing and track making skills, her cheerful, humorous, happy-go-lucky character has helped her gain fame across Japan, and she is now one of the up-and-coming idols in the business.

Recent Highlights

  • 2019 January - Commercial Appearance - Japan Coca Cola’s Georgia Worker’s Song campaign series.
  • 2019 April - Regular appearance on NHK E Television「Bit World
  • 2019 April - Start of national tour CHIAKI MAYUMURA 1st Tour Mejameja Monja
  • 2019 May - 1st Major Album Mejameja Monja released.
  • 2020 January - 2nd Major Album Gekidan Ogyarizumu released.
  • 2020 February: - Start of national tour CHIAKI MAYUMURA 2nd Tour Gekidan Ogyarizumu

Official Website:
Artist Website:

Chiaki Mayumura is scheduled to perform Friday and Saturday.

Chiaki Mayumura  will hold her autograph session after the conclusion of her concerts. Autograph tickets specifically for her signing sessions will not be handed out. Attendees interested in obtaining an autograph must buy at least one of her merchandise which will be available after the concert or at the Naka-Kon merchandise desk.