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Japanese submarine I-26

1940 Type B1 submarine

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 17, 2026
Entity authorityQ2704222 ↗
Source-derived summary

I-26 was an Imperial Japanese Navy B1 type submarine commissioned in 1941. She saw service in the Pacific War theatre of World War II, patrolling off the West Coast of Canada and the United States, the east coast of Australia, and Fiji and in the Indian Ocean and taking part in Operation K, preparatory operations for the Aleutian Islands campaign, and the Guadalcanal campaign, the Marianas campaign, and the Battle of Leyte Gulf. She was the first Japanese submarine to sink an American merchant ship in the war, sank the first ship lost off the coast of State of Washington during the war, damaged the aircraft carrier USS Saratoga, sank the light cruiser USS Juneau, and was the third-highest-scoring Japanese submarine of World War II in terms of shipping tonnage sunk. Her bombardment of Vancouver Island in 1942 was the first foreign attack on Canadian soil since 1870. In 1944, I-26′s crew committed war crimes in attacking the survivors of a ship she sank. She was sunk in November 1944 during her ninth war patrol.

Construction and commissioning

Built by the Kure Naval Arsenal at Kure, Japan, I-26 was laid down on 7 June 1939 as Submarine No. 139. She was launched on 10 April 1940 and provisionally numbered I-27 that day, but she was renumbered I-26 on 1 November 1941. She was completed and commissioned on 6 November 1941.

Editorial summary

The public source identifies “Japanese submarine I-26” as 1940 Type B1 submarine. This brief keeps that definition visible, then builds a research path around Japanese, submarine and I-26.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1941, 1942, 1870, 1944—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Japanese, submarine and I-26 providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Japanese submarine I-26”, the useful work is to connect “1940 Type B1 submarine” 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 May 17, 2026. The linked authority identifier is Q2704222. The first chronological checks are 1941, 1942, 1870 and 1944.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. 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.

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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 “Japanese submarine I-26” 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.