Key topic 4 · Political and economic challenges, 1919–31

What a Grade 9 answer knows here. Universal male suffrage and the Peace Preservation Law were passed in the same year, 1925. Japan democratised its franchise and criminalised political dissent simultaneously — which is why 'Taisho democracy' collapsed so fast.

Every lesson here ends the same way: learn it, teach it to an AI pupil who asks the awkward question, then defend it against the thinker with the strongest claim on it — free · no account needed.

2 lessons, each answering one essential question with the story, the dates that earn marks, the people to place, how historians disagree and the cap in the mark scheme that bites. Completely free.

The 2 lessons

Suffrage, labour and the Peace Preservation Law

What kind of country gives every man the vote and criminalises political dissent in the same year? The franchise had been extended in stages from the one per cent of 1890, but by the 1920s the tax qualification still excluded most adult men.

Examined through change and continuity. Learn suffrage, labour and the Peace Preservation Law →

The Kanto earthquake and the impact of the Depression

How does a stock market crash in New York reach a village in northern Japan within months? The 1920s were not prosperous in Japan.

Examined through causation and consequence. Learn the Kanto earthquake and the impact of the Depression →

The dates that earn marks in this key topic

Two from each lesson, in the order the topic is taught — each with the reason it is worth a mark, and the lesson that places it.

1918 — The rice riots spread across the country and bring down a government.: It shows the political weight of urban and rural discontent and precedes the suffrage campaign's success. (Suffrage, labour and the Peace Preservation Law)
1925 — Universal male suffrage and the Peace Preservation Law are passed in the same year.: Enfranchisement and criminalised dissent arrive together, which is the single most quotable fact on this key topic. (Suffrage, labour and the Peace Preservation Law)
1920 — The wartime boom ends in a sharp recession as European competitors return.: It establishes that the 1920s were difficult before either the earthquake or the Depression. (The Kanto earthquake and the impact of the Depression)
September 1923 — The Great Kanto Earthquake kills over a hundred thousand people and devastates Tokyo and Yokohama.: The relief measures propped up weak banks and postponed a financial crisis that arrived in 1927. (The Kanto earthquake and the impact of the Depression)

The people to place

Kato Takaaki — Prime Minister whose government carried both the suffrage law and the Peace Preservation Law in 1925. (Suffrage, labour and the Peace Preservation Law)
Inoue Junnosuke — Finance Minister who returned Japan to the gold standard at the old parity in 1930; assassinated in February 1932. (The Kanto earthquake and the impact of the Depression)
Takahashi Korekiyo — Finance Minister who took Japan off gold at the end of 1931 and began the recovery; killed in the mutiny of February 1936. (The Kanto earthquake and the impact of the Depression)

What students say — and what is actually the case

“The 1925 suffrage law made Japan a democracy.” — It enfranchised men over twenty-five, excluded women entirely, and was passed alongside a law criminalising organisations aiming to change the constitutional order. (Suffrage, labour and the Peace Preservation Law)
“Japan's economic problems began with the Wall Street Crash.” — The wartime boom ended in recession in 1920, the earthquake of 1923 destabilised the banks, and a financial crisis broke in 1927 — all before 1929. (The Kanto earthquake and the impact of the Depression)

What the specification asks for

The clauses of 4HI1 this key topic examines, one per lesson. Incandio is aligned to the specification and is not published by Pearson.

“Political conflicts, including the struggle over universal suffrage, an emerging labour movement and the Public Security Preservation Law (1925).” — Suffrage, labour and the Peace Preservation Law
“Economic decline in the 1920s: the impact of The Great Kanto Earthquake of 1923 and the effects on society, trade and industry of world Depression from 1929.” — The Kanto earthquake and the impact of the Depression

Then teach it, and defend it

Every lesson above ends the same way: you explain the argument to Ember, an AI pupil who asks the awkward question, and defend it in a structured debate marked against published descriptors.

All of Japan in transformation, 1853–1945 · Incandio History · The 4HI1 specification