SALGIL Water does not ask the way.

ENGLISH RECORD 14

Tatsuki Ryo and the Nankai Trough

私が見た未来 · Watashi ga Mita Mirai
684–1946 historical earthquakes · 1999 and 2021 editions · 2025 outcomeSuruga Bay · Tōkai · Kii Peninsula · Shikoku · Hyūga-nadaDream diary · Nankai Trough · earthquake and tsunami history

01 · WHAT IT IS

Overview

A bilingual source study separating Tatsuki Ryo's 1999 and 2021 editions while documenting the geography, coastal communities and recurring great earthquakes along the Nankai Trough since 684.
58/100source traceability

02 · ORIGINAL TEXT AND EARLIEST SOURCE

What can be traced?

The 1999 cover was published before the Tōhoku disaster and contains the phrase 'a major disaster in March 2011.' The sea rupture, giant tsunami and July 2025 narrative were added in the post-2011 complete edition published in 2021. The book does not itself name the Nankai Trough.

03 · HISTORICAL BACKGROUND

The world behind the text

The Nankai Trough is a subduction boundary extending from Suruga Bay to Hyūga-nada. Mountains crowd close to a coast of bays, peninsulas, fishing communities, ports and industrial cities, making rapid tsunami evacuation as important as strong-shaking resistance. Historical records include broad simultaneous rupture in 1707, an approximately 32-hour interval in 1854, and the 1944 and 1946 Shōwa earthquakes about two years apart.

105 · TATSUKI RYO AND THE NANKAI RECORD

Keep one dream narrative separate from a millennium of earthquakes

1999 first edition · 2021 complete edition · 2025 result · 684–1946 earthquake history
Tatsuki Ryo's books form a traceable publication record. The Nankai Trough is also a real plate boundary with recurring great earthquakes. Combining those facts does not show that the book predicted the date of the next Nankai rupture. This record preserves editions, regional context, earthquake history and scientific hazard as separate evidence layers.
SALGIL editorial graphic separating Tatsuki Ryo's editions from the Nankai earthquake record
SALGIL editorial graphic pairing edition analysis with the earthquake ledger

01 · EDITION & OUTCOME LEDGER

Fix four different dates hidden under one book title

First edition

The cover printed the month-year phrase 'a major disaster in March 2011.'

Pre-event record

Tōhoku disaster

The month-year match revived attention in the out-of-print book and the author's dream notes.

Observed event

Complete edition

The July 2025 sea-rise and giant-tsunami narrative was newly published.

Post-2011 edition

Window closed

No seabed rupture and giant tsunami on the described scale occurred within the stated period.

Did not occur in window

02 · PLACE BEFORE PROPHECY

'Nankai' is not one modern administrative region but a long Pacific hazard belt

Here the Nankai region means the Pacific coast facing the trough from Suruga Bay to the Hyūga-nada Sea. The Philippine Sea Plate subducts beneath Japan, and eastern and western segments have ruptured together or after delays.
Philippine Sea Plate subduction
01

Tōkai and Suruga

Shizuoka · Aichi

Suruga Bay, ports, cities and a major manufacturing corridor sit near the eastern segment.

02

Kii Peninsula

Mie · Wakayama

Mountains reach the sea around small bays and ports; pilgrimage landscapes, fishing communities and coastal settlements share the same terrain.

03

Southeast Shikoku

Tokushima · Kochi

A long Kuroshio-facing coast, fishing culture, narrow coastal plains and estuary cities define the exposure.

04

Hyūga-nada

off Oita · Miyazaki

The western end meets eastern Kyushu waters, where separate large earthquakes also recur.

03 · HISTORICAL EARTHQUAKE LEDGER

Major events preserved in documents and geological traces

Hakuhō (Tenmu)

Widely treated as the earliest documentary Nankai earthquake, with subsidence and damage reported in Tosa.

Ancient record

Ninna

A great Nankai event and tsunami caused many coastal deaths.

Ancient record

Eichō and Kōwa tradition

Long treated as an east-west pair about three years apart, though the existence and rupture extent of the 1099 event have been re-examined.

Scholarly dispute

Shōhei (Kōan)

Medieval records preserve strong shaking and tsunami damage along Kii and Shikoku.

Medieval record

Meiō and the western gap

The eastern event is clear, but the timing and extent of a corresponding western rupture remain uncertain.

Uncertainty retained

Keichō

A tsunami-heavy event with comparatively limited shaking records; its linked rupture pattern remains debated.

Historical record

Hōei

One of Japan's largest historical earthquakes, commonly modeled as a broad multi-segment rupture with severe Kii and Shikoku tsunamis.

Broad rupture

Ansei Tōkai and Nankai

The western earthquake followed the eastern event by about 32 hours. Local documents and the Inamura-no-Hi tradition preserve the tsunami experience.

Delayed rupture

Shōwa Tōnankai and Nankai

The western Nankai event followed the eastern rupture by about two years; its tsunami reached 4–6 m on parts of the Tokushima and Kochi coasts.

Instrumental era

04 · RUPTURE PATTERNS

Nankai earthquakes have not behaved as one event at one point

Broad near-simultaneous rupture

Hōei is the standard linked-segment example.

About 32 hours

Ansei Nankai followed Ansei Tōkai.

About two years

Shōwa Nankai followed Shōwa Tōnankai.

Because a major rupture in one segment can raise concern about another, Japan operates Nankai Trough Earthquake Extra Information. It is not an exact-date prediction, and a great earthquake may still occur suddenly without a preceding advisory.

05 · SCIENCE / CLAIM BOUNDARY

Do not turn a real hazard into proof of a date prophecy

The trough exists

Bathymetry, plate tectonics and observations

Established

Great events recur

Documents, tsunami evidence and instruments

Established; intervals vary

Long-term likelihood

Probability from statistics and crustal deformation

Preparedness input

Exact day and hour

Cannot currently be specified in advance

Separate from viral prediction

5 July 2025

A date hardened during online retelling

Later interpretation, not book wording

06 · SALGIL VERDICT

Preserve the partial match, failed deadline and real hazard together

The March 2011 month-year phrase on the 1999 cover deserves preservation as a rare pre-event match, but it did not specify place, hazard type or exact day. The July 2025 disaster narrative, published in 2021, did not occur within its window. Independently, the Nankai Trough remains a real hazard documented since 684. SALGIL does not let prophecy scoring replace emergency science—or vice versa.
58/100source traceability

07 · SOURCES

Publisher records, seismology and disaster history

Editorial review: 17 September 2026 · uncertainty in ancient events and historical-earthquake scholarship is retained.
P1Asukashinsha · The Future I Saw, Complete Edition↗P2Bungeisha · The Angel's Testament↗A1Japan Meteorological Agency · Nankai Trough earthquakes↗A2JMA Kochi · historical damaging earthquakes↗A3Headquarters for Earthquake Research Promotion · Kochi↗A4MLIT Shikoku · damage from Tonankai and Nankai earthquakes↗A5Gobo City · records of past Nankai earthquakes↗A6Cabinet Office · Nankai Trough megaquake model↗

12 · RELATED RECORDS

Continue through the archive

RECORD 09Maya Long Count and 2012Calendar · archaeology · modern mythRECORD 12John TitorSelf-described time traveller · participatory legendRECORD 13Abhigya AnandVedic astrology · pandemic claims