History & periods

How Japan’s warrior retainers rose from Heian stewards to Edo bureaucrats—and why the class ended in 1868. Period-by-period guide for beginners. (18 min read)

How bushi stewards and provincial muscle grew under Heian court culture—and why this era is the root of later samurai power, not armored movie clichés. (17 min read)

Minamoto Yoritomo’s bakufu, gokenin retainers, Jōkyū War, and Mongol invasions—how Kamakura turned Heian stewards into Japan’s warrior government. (17 min read)

Samurai vs Mongol invasions—Bun'ei 1274 and Kōan 1281 at Hakata Bay, Genkō walls, Yuan–Goryeo fleets, fighting-style clash, storms vs myth, and Kamakura bakufu aftermath. (26 min read)

Nanboku-chō split, weak Ashikaga shoguns, shugo becoming daimyo, and culture (tea, Noh) in an age before full Sengoku chaos. (17 min read)

Warring States Japan: daimyo castles, ashigaru armies, tanegashima matchlocks, and Oda–Toyotomi–Tokugawa unification before Edo peace. (18 min read)

How Portuguese merchants reached Japan in 1543, sparked Nanban trade in silk and silver, introduced matchlock firearms, and reshaped Sengoku warfare—plus what missionaries and daimyo gained. (24 min read)

Oda Nobunaga (1534–1582)—Sengoku warlord who used guns, castles, and ruthless politics to break old powers and start Japan’s unification before Honnō-ji. (18 min read)

Beginner chronological timeline of the Oda clan—Owari shugodai roots, Nobuhide and Nobunaga rise, Okehazama through Azuchi, Honnō-ji 1582, and the short aftermath before Toyotomi and Tokugawa take the stage. (26 min read)

Toyotomi Hideyoshi (1537–1598)—Oda retainer who finished unification, froze class lines, built Osaka Castle, and invaded Korea before the Toyotomi fall. (18 min read)

Tokugawa Ieyasu (1543–1616)—patient warlord who won Sekigahara (1600), became shogun (1603), and built the system behind Edo-period samurai life. (18 min read)

Miyamoto Musashi (c. 1584–1645)—ronin swordsman, Niten-ryū style, Ganryū Island duel, and The Book of Five Rings—what records support and what manga invents. (18 min read)

Sanada Yukimura (1567?–1615)—Toyotomi loyalist, Osaka winter and summer campaigns, and how Edo storytelling turned him into Japan’s tragic hero samurai. (17 min read)

Beginner life of Sanada Nobushige (popularly Yukimura): family, Ueda, Sekigahara exile, Kudoyama years, Osaka winter and summer choices, death, and what myth added later. (28 min read)

Date Masamune (1567–1636)—daimyo of Mutsu, crescent moon crest, early Christian contact, and survivor who thrived under Tokugawa after siding late with winners. (17 min read)

A deeper life arc of Date Masamune (1567–1636)—smallpox and the lost eye, his father’s death and a brother’s execution, the Tōhoku wars, Sekigahara’s broken million-koku promise, Sendai’s founding, the Keichō Embassy, and his death—sorted by what sources actually support. (21 min read)

Uesugi Kenshin (1530–1578)—lord of Echigo, five Kawanakajima clashes with Takeda Shingen, devotion to Bishamonten, and why later Japan called him a god of war. (18 min read)

Full beginner chronology of Uesugi Kenshin—birth as Nagao Kagetora, rise in Echigo, Bishamonten devotion, Kawanakajima rivalry with Takeda Shingen, Kyoto visits, death in 1578, and the Otate succession crisis. (28 min read)

Takeda Shingen (1521–1573)—Kai province warlord, “wind forest fire mountain” motto, Kawanakajima wars, and why his death let Nobunaga reshape Japan. (18 min read)

Beginner chronology of the Kai Takeda—from Minamoto roots and Sengoku expansion under Shingen, through Katsuyori, Nagashino 1575, and the 1582 fall. Pair with takeda-clan and takeda-shingen. (28 min read)

Beginner chronology of the Uesugi—from Yamanouchi/Ogigayatsu kanrei rivalry, through Nagao Kagetora’s adoption as Uesugi Kenshin, Kawanakajima, the Otate succession war, Kagekatsu’s Aizu peak, and the 1601 fall to Yonezawa. (28 min read)

Beginner chronology of the Odawara Go-Hōjō, from Sōun’s Izu foothold through Ujiyasu’s Kantō peak, rivalries with Uesugi/Takeda/Imagawa, and Hideyoshi’s 1590 Odawara campaign. Clarifies Later Hōjō vs Kamakura Hōjō. (28 min read)

Beginner chronology of the Shimazu of Satsuma—Kamakura manor roots, Yoshihisa’s Kyushu peak, Hideyoshi’s 1587 check, Korean campaigns, Sekigahara survival, Ryūkyū 1609, and the long Edo domain. Pair with shimazu-clan. (28 min read)

Hattori Hanzō (1542–1596)—Iga ninja captain for Tokugawa Ieyasu, Edo castle gate namesake, and how movies merged several real men into one legend. (17 min read)

Tokugawa bakufu, sankin-kōtai, koku stipends, castle-town clerks, and the sword-carrying class under two centuries of relative peace. (18 min read)

How imperial restoration, conscript army, stipend abolition, and sword laws ended feudal samurai—and what happened to ex-warriors after. (18 min read)

Why warrior retainers gained power in medieval Japan and how stipend peace, guns, debt, and Meiji reform ended the class in 1868. (17 min read)

Himeji Castle guide—Ikeda and Honda lords, maze baileys, tenshu floors, samurai garrison life, UNESCO facts, travel tips, and armor displays for beginners. (30 min read)

Guide to Ichijodani—the Asakura clan capital burned by Oda Nobunaga in 1573. Excavations, 1.7 million artifacts, samurai streets, museum, travel tips, and daily life for beginners. (32 min read)

Guide to the Yonezawa City Uesugi Museum 25th-anniversary show on Uesugi Kenshin and the Battles of Kawanakajima—five-battle lore vs new scholarship, loaned documents, and festival myth. (24 min read)

Guide to the Yonezawa Uesugi Shrine Keishoden summer–autumn 2026 show on lord Uesugi Kagekatsu and retainer Naoe Kanetsugu—purple-laced armor, the “Ai” maedate helmet, rotation dates, and what museum labels actually prove. (22 min read)

Guide to the NHK Taiga Drama special exhibition Toyotomi Brothers! at Osaka Museum of History—dates, tickets, Hidenaga’s role, rotating objects, and how drama shows sell real history. (28 min read)

Guide to Toyotomi Hideyoshi and Otsu at Otsu City Museum of History (18 July–30 August 2026): Sakamoto and Otsu castles, temple politics, first public wooden finds from Sakamoto’s san-no-maru, tickets, and visit tips. (22 min read)

Guide to Sendai City Museum’s summer 2026 feature Challenge from Date Masamune—quiz trails, Important Cultural Property black-lacquer armor from all sides, letters to Yoshihime, and what private notes reveal that armor cannot. (22 min read)

Guide to Ichijodani—the Asakura clan capital burned by Oda Nobunaga in 1573. Excavations, 1.7 million artifacts, samurai streets, museum, travel tips, and daily life for beginners. (32 min read)

Beginner guide to Akechi Mitsuhide’s lakeside Sakamoto Castle in Otsu—why it vanished, how archaeologists reconstruct it without drawings, and what May 2026 honmaru foundation stones change. (28 min read)

June 2026 identification of a late Yayoi iron saw at Hayashi-Fujishima, Fukui—what the tiny beak-shaped blade shows about early iron tools, timber craft, ships, and later castle building. (22 min read)

Beginner guide to Tokugawa sakoku—Dutch and Chinese trade at Nagasaki, banned Christianity, controlled ports, Korean and Ryukyu gateways, and why Japan was never totally cut off. (26 min read)

Beginner guide to Christianity in the samurai class—Jesuit missions after 1549, Kirishitan daimyo, Hideyoshi and Tokugawa persecution, and why faith became a political problem under sakoku. (22 min read)

Who Tomoe Gozen was in The Tale of the Heike—Awazu, Yoshinaka, historicity debates—plus Hangaku Gozen, Tachibana Ginchiyo, and how to read onna-musha stories without myth overload. (30 min read)