Fans often ask: Is this just Boku no Natsuyasumi with a new coat of paint? Partially, yes. But Natsu-Mon improves the formula:
| Feature | Boku no Natsuyasumi | Natsu-Mon: 20th Century Summer Vacation | | :--- | :--- | :--- | | Movement | Tank controls (Pre-rendered) | Full analog 3D climbing | | Time System | Fast (Minutes pass quickly) | Slow, realistic pace | | Combat | None | None (No violence) | | VR/Immersion | Photo album ending | 1:1 Real-time event triggers | | Localization | Rare (JP only often) | Full English/Chinese text |
Natsu-Mon: 20th Century Summer Vacation is a spiritual successor to the beloved Boku no Natsuyasumi (My Summer Vacation) series, which never saw official Western releases until now. You play as a young boy (default name: Satoru) spending his summer in the rural town of Yomugi, helping a local circus family, catching insects, fishing, swimming, and exploring every hill and riverside. There is no combat, no fail states, and no time limits—just pure, immersive nostalgia for a 20th-century Japanese childhood. Natsu-Mon 20th Century Summer Vacation -NSP--As...
You play as a young boy (default name Satoru) spending a month (August) staying with relatives in a seaside town. There are no aliens to fight, no dungeons to crawl, and no game-over screens. The "goal" of the game is simply to enjoy your summer vacation before it ends on August 31st.
Many search queries combine “Natsu-Mon” with “NSP” (the encrypted Switch game format) and often a trailing “As...” which could refer to “as an emulation,” “as a digital download,” or “as compared to Boku no Natsuyasumi.” For clarity, we will address: Fans often ask: Is this just Boku no
We are now further from the game’s 2021 release than the game is from its 1999 setting (22 years vs. 24 years). In 2025, as AI generates instant content and AR filters warp reality, Natsu-Mon feels like an archaeological dig. Children in 2025 have never used a landline. The game’s scene of Satoru waiting by the phone for a call from his Tokyo friend is now a period piece.
Critical Acclaim (MetaScore 84):
Platform: Nintendo Switch (also PC, PS4)
Developer: Millennium Kitchen (creators of Boku no Natsuyasumi series)
Publisher: Spike Chunsoft
Release Date: July 2021 (JP), August 2023 (WW)
Genre: Adventure / Life Simulation / Open-World Relaxation
An NSP is a Nintendo Switch game package format, often used by digital titles or physical cartridge dumps. It contains the game’s executable, assets, updates (UPD), and DLC. For Natsu-Mon, the base NSP is approximately 3.2 GB, with a title update (v1.0.2) addressing minor bug fixes and load times. You play as a young boy (default name
Searching for the NSP (Nintendo Submission Package) of Natsu-Mon usually indicates a desire for a digital backup copy or an interest in the homebrew scene. Legally, the game is available on the eShop. However, the physical cartridge (Japanese import) is rare and expensive.
Pros of the NSP/Digital Version: