Chiba, a land once under the sea, has seen towns emerge, and castles and rivers have shaped human movement. From Jomon shell mounds to three kingdoms, the Chiba clan and the Sengoku period, Edo-period water transport, railways, reclaimed land, and airports, this approximately 39-minute video traces the history of Boso, connecting to its current landscape, using maps, historical documents, and actual photographs.

If this video is well-received, we plan to produce a sequel.

If you'd like to see more, we'd appreciate your support through likes, channel subscriptions, comments, and hype!

Chapter
00:00 The Gateway to Chiba's History
00:30 Land Invaded by the Sea
02:57 Burial Mounds, Three Provinces, and Places of Prayer
07:56 The Spread of the Chiba Clan
11:39 The Castle Moved to Hon-Sakura
14:44 The Warring States Period Across Tokyo Bay
19:19 Rivers Bringing Flavors to Edo
22:51 Sawara's Trade and Pilgrimages to Narita
24:47 The Coastlines of Kujukuri and Minami-Boso
25:48 The Buddha and Stone Quarrying of Nokogiriyama
26:47 From the End of the Edo Period to the Meiji Era: The Outline of Chiba Prefecture
29:35 Railway Lines Extending to the Sea and Hills
31:19 Burnt Towns, Transformed Coastlines
33:30 New Transportation to Welcome People
37:08 Before Closing the Map

Narration: AI Voice (Irodori-TTS).

Some parts of the video use generated AI. Music, Photo, and Material Credits
BGM: Kevin MacLeod (CC BY 4.0)
Water Lily
https://incompetech.com/music/royalty...
Fluidscape
https://incompetech.com/music/royalty...
Lightless Dawn
https://incompetech.com/music/royalty...
Excerpt, volume adjustment, fade, and layout editing.

Maps and Aerial Photographs: Processed from Geospatial Information Authority of Japan tiles. Sea Area: Japan Coast Guard Hydrographic and Oceanographic Department. Satellite Texture: Landsat8 (GSI, TSIC, GEO Grid/AIST, USGS), Seabed Topography: GEBCO.

https://maps.gsi.go.jp/development/ic...
Prefectural area: Processed from National Land Numerical Information Administrative Area Data (January 1, 2025).
https://nlftp.mlit.go.jp/ksj/gml/data...
Layout map of Kasori Shell Mound: Processed from Figure 2-6 of Chiba City's "Preservation and Utilization Plan".
https://www.city.chiba.jp/kyoiku/shog...
"Statue of Toyotomi Hideyoshi," 16th century, Keio University (Century Akao Collection), CC BY 4.0
https://objecthub.keio.ac.jp/ja/objec...
"Statue of Ino Tadataka," 1821, attributed to Aoki Katsujiro, Ino Tadataka Memorial Museum, Katori City, Chiba Prefecture Collection
https://www.city.katori.lg.jp/sightse...
"Map of Japan: Eastern Japan," "Letter in the Hand of Ino Tadataka," "Portrait of Lord Ieyasu": National Diet Library Collection (PDM)
https://dl.ndl.go.jp/pid/1286166
https://dl.ndl.go.jp/pid/2540702
https://dl.ndl.go.jp/pid/2542434
Photograph
Narita Airport: Marufish/CC BY-SA 2.0
https://commons.wikimedia.org/wiki/Fi...
Festival at Chiba Shrine: Tatsuo Hayashi/CC BY 4.0
https://www.chiba-muse.or.jp/NATURAL/...
Onogawa River in Sawara: katorisi/CC BY 2.5
https://commons.wikimedia.org/wiki/Fi...
Ino Tadataka's Former Residence and Shop: Katorisi/CC BY 2.5
https://commons.wikimedia.org/wiki/Fi...
Ino Tadataka's Former Residence and Onogawa River: Katorisi/CC BY 2.5
https://commons.wikimedia.org/wiki/Fi...
The Great Buddha of Nihonji Temple: Guilhem Vellut/CC BY 2.0
https://commons.wikimedia.org/wiki/Fi...
Transporting stone materials from Nokogiriyama: Original photographer unknown / Hishida Tadayoshi Postcard Collection / CC BY 4.0
https://www.chiba-muse.or.jp/NATURAL/...
Nojimazaki Lighthouse: hiroaki / CC BY 2.0
https://commons.wikimedia.org/wiki/Fi...
Kashiwa Station: Nesnad / CC BY 4.0
https://commons.wikimedia.org/wiki/Fi...
Freight locomotive in Choshi: Tatsuo Hayashi / CC BY 4.0
https://www.chiba-muse.or.jp/NATURAL/...
Kazusa-Nakano Station: Nesnad / CC BY 4.0
https://commons.wikimedia.org/wiki/Fi...
Makuhari Messe: Fumihiko Ueno / CC BY 3.0
https://commons.wikimedia.org/wiki/Fi...^_Bay_Stadium_(Makuhari Messe and Bay Stadium)_-_panoramio.jpg
Tokyo Bay Aqua-Line: Nesnad/CC BY-SA 3.0
https://commons.wikimedia.org/wiki/Fi...
Flower Fields at Shiramazu, Minami-boso: Kikucha/CC BY-SA 3.0
https://commons.wikimedia.org/wiki/Fi....