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Genna

Japanese era from September 1615 to April 1624

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 25, 2026
Entity authorityQ635245 ↗
Source-derived summary

Genna (元和) was a Japanese era name (年号, nengō; "year name") coming after Keichō and before Kan'ei. This period spanned the time from September 5, 1615 to April 17, 1624 in the Gregorian calendar. The reigning emperor was Go-Mizunoo-tennō (後水尾天皇). It is also known as Genwa.

Change of era

1615 Genna gannen (元和元年): The era name was changed to mark the enthronement of Go-Mizunuoo and because of disasters such as the siege of Osaka (大坂の役,, Ōsaka-no-eki), or more commonly, siege of Osaka (大坂の陣,, Ōsaka-no-jin). The old era ended and a new one commenced in Keichō 20.

The siege of Osaka was a series of battles undertaken by the Tokugawa shogunate against the Toyotomi clan, ending in that clan's destruction. Divided into two stages (the "Winter Campaign" and the "Summer Campaign"), and lasting from 1614 through 1615, the siege put an end to the last major armed opposition to the establishment of an enduring Tokugawa shogunate. The end of this period of fighting is also sometimes called the Genna armistice (元和偃武,, Genna-enbu) because the era name was changed from Keichō to Genna immediately following its ultimate resolution.

By order of Tokugawa Ieyasu, the era name of Emperor Xianzong of Tang China was adopted.

Editorial summary

The public source identifies “Genna” as japanese era from September 1615 to April 1624. This brief keeps that definition visible, then builds a research path around Genna, Japanese and September.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—1615, 1624, 1614—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Genna, Japanese and September providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Genna”, the useful work is to connect “japanese era from September 1615 to April 1624” to the records capable of establishing context and consequence.

Evidence profile

The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 25, 2026. The linked authority identifier is Q635245. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1615, 1624 and 1614.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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Source & attribution

This entry incorporates text from “Genna” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.