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歴史民俗学習館 Rekishi minzoku gakushukan
Renewed in 2020, this museum focuses on topics other than the famous battle, from archaeological times to today.
床几場 Shōgiba
Also called "Tokugawa's Final Encampment", this is the spot where Tokugawa Ieyasu held a council meeting after the end of the battle and was presented with the decapitated heads of the enemy's leaders. A small shrine marks the spot.
岐阜関ケ原古戦場記念館, Gifu Sekigahara Kosenjō Kinenkan
This new museum (built 2020) offers a good introduction to the battle itself. It is especially helpful because the first two exhibits (both visual media - a bird's eye view of the battle and an anime-like 4D theater movie depicting what it was like in the fray) provide the necessary background to understand how the 6-hour battle went and why Tokugawa won. The upper floors contain mainly replicas (although some original artifacts and documents are displayed) of writings relating to the battle or Tokugawa's rise to power, and then goes in depth of the aftermath of the battle and the consolidation of his rule. Kids and the young at heart will enjoy the third floor, which offers a hands-on exhibit where you can play around with different types of weapons used during the battle (such as katanas, matchlock rifles, and battle fans). The fifth floor is an observation deck that gives a panorama of the battlefield and town, and has signs (in Japanese) that indicate where each important thing is/was. The staff don't speak English and about 85% of the exhibits have English translations, but the movies have English subtitles.
関ケ原古戦場 Sekigahara kosenjō
This marks the site of the bloodiest clash between the Eastern and Western armies in the Battle of Sekigahara. The monument here is flanked by the flags of the leaders of both armies, Ishida and Tokugawa.
岡山烽火場 Okayama noroshi-ba
To the northeast of the town, this was from where the flare was fired that signaled that the Western Alliance needed reinforcements. The signal sent a message to Tokugawa that enabled him to move his camp closer to the battlefield, boosting troop morale among the Eastern Alliance forces. Like Ishida's Encampment, this can easily be seen from most of the town.
国指定史跡 関ヶ原古戦場 開戦地
A marker dedicated to where the first shots of the battle were fired. It also has benches and information boards that detail the order of battle and positions.