Set in Kyoto, a city dyed red with autumn leaves, this is a new type of mystery-solving event that will immerse you in the story. The first-ever “Love Letter Detective: Takamine Natsume’s Case Files” will be held!

A new, immersive mystery-solving event set in Kyoto amidst the autumn foliage. The first-ever “Love Letter Detective: Takamine Natsume’s Case Files” event! ​ SUNROOTS Co., Ltd. Press Release: October 29, 2025 A new type of mystery-solving event set in Kyoto, where the leaves are turning red in autumn, immerses you in the story. The first-ever “Love Letter Detective: Takamine Natsume’s Case Files” event! In pursuit of a missing love letter, an immersive mystery unravels the truth hidden in autumn in Kyoto. HANAKAGARI (Headquarters: Ota-ku, Tokyo; Producer: Seiichi Kaga) is hosting “Love Letter Detective,” an immersive mystery-solving experience event, this fall, in the season when the autumn leaves are at their most beautiful, set in Kyoto’s historic temples and shopping streets. “Takamine Natsume’s Case Files” will be held on Saturday, November 15th and Sunday, November 16th, 2025. This short drama became a hot topic immediately after its release, garnering over 100,000 total views in just two weeks. It’s garnering attention as a new type of immersive mystery where reality and fiction intersect.
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Another story set in the ancient capital of autumn leaves. An immersive mystery event for “Love Letter Detective: Takamine Natsume’s Case Files,” an immersive puzzle-solving experience from Kyoto that connects the world of the drama with reality, will be held for the first time in the Okazaki area of ​​Kyoto on Saturday, November 15th and Sunday, November 16th, 2025. This “story-immersive mystery” combines a short drama with a real-life event. The short drama, which began streaming on Instagram and TikTok on October 1st, has been generating buzz for its direction that transcends the boundaries between reality and story, and has already garnered over 100,000 total views. In the sequel, a mystery-solving event, characters and plot twists from the drama are linked to the “real-life Kyoto,” and participants will become apprentice detectives, the protagonists of the story, and get to the heart of the matter. The setting is the Jodo sect’s head temple, Kurodani Konkai-Komyoji Temple, in Kyoto City’s Sakyo Ward, and the Furukawacho shopping district in Kyoto City’s Higashiyama Ward. The temple’s historical architecture, which is normally closed to the public, will be specially opened to the public, and participants will be able to enjoy an immersive mystery-solving experience as they explore the town of Okazaki, Kyoto, with a mystery-solving kit in hand, walking along the stone-paved approach to the temple, dyed in autumn leaves, and through the tranquil space of the temple, in pursuit of the truth behind the “disappeared love letter.” ■Holding background Kyoto is home to more than a thousand years of history, culture, and the lives of its people. However, in recent years, opportunities to experience traditional Japanese culture, such as temples and indigo dyeing, have been declining among young people. This project, in collaboration with local shopping districts and temples, aims to bridge the gap between culture and young people through entertainment and help people rediscover the value of local cultural assets and shopping districts. The story’s theme, love letters, embodies the power to convey feelings, something that is being lost in the age of social media. Participants will walk the streets of Kyoto as detectives, searching for the truth behind a missing love letter. Through this process, participants will be able to experience universal messages such as the connection between people, memories, and the inheritance of culture. ■Vertical Short Drama Cast List
https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-f83617920650accee815fc802d92649e-778×781.jpg Makoto Tanaka (playing Takamine Natsume) Born on January 30, 1995, in Kyoto Prefecture. He has appeared in dramas such as “Kimi ga Kokoro ni Sumitsuita” (2018), “Black Scandal” (2018), and “Hidarikiki no Ellen” (2019). In recent years, he has also been a hot topic for appearing in Amazon Prime commercials. He is a talented actor who starred in the film “Honna Mata Ashita” (2024).
https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-ac3b0d6b6c789f2467617e14e4273fd6-1046×1046.jpg Kazuaki Yasue (playing Juzo Okazaki) Born December 19, 1994, in Osaka Prefecture. His notable roles include the stage play “Jujutsu Kaisen” as Megumi Fushiguro and the musical “The New Prince of Tennis” as Kanata Irie. He has also appeared in a wide range of 2.5-dimensional stage productions, including the role of the “Fox Mask Man” in the game “SILENT HILL f.”
https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-116490c99a6ff70cfbd33ec802abf181-1044×1044.jpg Rina Miyamoto (Rina Miyamoto) / Furukawa Ai Born on May 12, 2001, in Wakayama Prefecture. A member of Cent Force Kansai, she is active mainly in the Kansai region, serving as a PR ambassador for JA Wakayama’s local specialties and as a reporter for Yomiuri TV’s “Kansai Information Network ten.” This is her first drama appearance as a promising new star.
https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-ac495941684dcfc3b8a551d44ee371e5-1045×1045.jpg Emika Kamieda (playing the role of Fuyuko Takamine) Born on July 13, 1994, in Osaka Prefecture. Currently active as an actress and model in Spain and Japan. Former captain of NMB48’s Team BII. In 2025, she appeared as Haiku in the Netflix drama “Billionaire’s Shelter,” which was released in over 190 countries. She has 1.09 million followers on TikTok.
https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-ec820637fddbf1ace39b0fcb556d14a3-440×440.jpg Kaga Seiichi (Kaga Seiichi) / Takamine Haruo Born on February 27, 1980 in Adachi Ward, Tokyo. A member of the theatrical comedy duo Otona no Cafe. His notable works include the film “Yukikaze” and the drama “Kariage-kun.” He also wrote the script for this film, participating as both an actor and a screenwriter.
https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-c26e65e5ceee8f8f1c745e2247801549-400×400.jpg Tatekawa Kasime (Tatekawa Kasime) / Special Navigator A disciple of Tatekawa Shiraku and a student of Tatekawa Koshira. At the age of 25, he left an advertising agency to become a rakugo performer, and enjoys combining rakugo with various content. He specializes in reworking classic rakugo stories, calling them “Kaisaku Rakugo,” which are not only entertaining but also add a certain eeriness and mystery. In addition to rakugo, he is active in a wide range of media, streaming, events, and more. ■ “Love Letter Detective Takamine Natsume’s Case Files Event Overview”
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https://prcdn.freetls.fastly.net/release_image/170258/1/170258-1-7c30b301218934fd44d01c371aa71c2d-3900×2600.jpg Performance name: Love Letter Detective Takamine Natsume’s Case Files Performance dates: November 15th (Sat), 16th (Sun), 2025 Performance time: Part 1 performance 09:30 / Part 2 performance 13:00 / Part 3 performance 14:15 Venue: Kyoto, Kurodani Konkai Komyoji & Furukawacho Shopping Street Production Manager: HANAKAGARI Tickets: Mystery Solving Kit & Experience Ticket 3,900 yen (tax included) Sales Website: Peatix https://peatix.com/event/4601008 * The third performance on both days will feature a famous scene from “Konoya Takao” by Tachikawa Kashime, a finalist in the NHK Newcomer Rakugo Awards. ■Crowdfunding / CAMPFIRE Project Page https://x.gd/mF6Kn ■Official HP https://www.natume-tantei.com ■Official SNS Instagram: https://www.instagram.com/natsume_tantei TikTok:
https://www.tiktok.com/@natsume_tantei X: https://x.com/natsume_tantei For more information about this release Press release attachments