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Japan Prefectures and Capitals Quiz | Terrain, Climate and Disaster Risk, Set 2

1 / 100.0s

Problem 1

On a slope-gradient map from the Geospatial Information Authority of Japan, candidate site A appears almost white and candidate site B appears black. Assume that other conditions such as elevation and geology are not to be judged from this map.

If you want the site with the gentler slope, what can be judged directly from this map?

View explanation

On a slope-gradient map, the whiter the gentler and the blacker the steeper, so the map shows A to be the gentler. The shading does not directly represent elevation or the firmness of the ground, so it cannot be said that A is higher or that B is firmer.

Problem 2

River data from the Ministry of Land, Infrastructure, Transport and Tourism gives: - Shinano River: main channel length 367 km, basin area 11,900 km² - Tone River: main channel length 322 km, basin area 16,840 km² Basin area here means the area from which rainfall drains into that river.

Which conclusion follows from these data?

View explanation

In length the Shinano's 367 km exceeds the Tone's 322 km, but in basin area the Tone's 16,840 km² exceeds the Shinano's 11,900 km². Length and the extent of the area collecting rainfall are separate measures, so the longest river does not necessarily have the largest basin.

Problem 3

You are considering why heavy snow falls on the Sea of Japan side in winter, following the seasonal wind as it moves from the continent to the Japanese archipelago.

Which matches the Japan Meteorological Agency's explanation?

View explanation

The winter seasonal wind is cold and dry as it leaves the continent, but it takes up water vapor while crossing the relatively warm Sea of Japan, and snow cloud develops. That cloud drops snow on the windward side of the central mountains. The explanation involves neither snow cloud arriving from the Pacific nor a wind blowing from Japan toward the continent.

Problem 4

You are organizing the currents around Japan by direction of flow and the properties of the water.

Which correctly describes the Oyashio?

View explanation

The Oyashio is a cold current flowing south along the Kuril Islands as far as the waters east of Japan, low in temperature and salinity and rich in nutrients. The representative warm current flowing north from the south of Japan is the Kuroshio, which differs from the Oyashio in both direction and temperature.

Problem 5

According to the Ministry of the Environment's overview of the sea areas, the Seto Inland Sea opens to the Pacific through the Kii and Bungo channels, and to another sea area through the Kanmon Strait.

Which sea area lies beyond the Kanmon Strait from the Seto Inland Sea?

View explanation

In the ministry's account, the Kanmon Strait connects the Seto Inland Sea to the Sea of Japan. The openings to the Pacific are the Kii and Bungo channels, so treating the Kanmon Strait as the exit to the Pacific is a mistake.

Problem 6

A volcano is neither erupting nor fumarolically active at present, but geological survey confirms an eruption about 7,000 years ago.

Against the Japan Meteorological Agency's definition of an active volcano in Japan, how should this volcano be judged?

View explanation

An active volcano is defined as one that has erupted within roughly the last 10,000 years, or that has vigorous fumarolic activity at present. An eruption about 7,000 years ago satisfies the first condition, so it is an active volcano even while currently quiet. The definition is not limited to historical records or present eruption.

Problem 7

In a community disaster-preparedness class, a check of the GSI Maps shows no natural disaster monuments at all around the school.

What is the most appropriate next step?

View explanation

Monuments may not appear because they have not been identified or registered, or because they have been removed or relocated, so their absence proves neither that no disaster occurred nor that the area is safe. Combining landform classification, hazard maps and municipal material lets past records and present risk complement one another.

Problem 8

On a flood-control landform classification map, part of a residential area is classified as a "former river channel (distinct)". On the ground no watercourse is visible, and it is away from the present river.

Given how the land was formed, which pair deserves particular attention?

View explanation

A former river channel is the course of an old river, and a distinct one lies lower than the surrounding floodplain, so water gathers there easily. The ground is also soft, so deep and prolonged inundation and liquefaction during an earthquake require attention. The absence of a visible river today does not mean the connection with flooding has gone.

Problem 9

You are labelling three mountain ranges in central Japan with their popular names: the Northern, Central and Southern Alps.

Which pairing of range and popular name is correct?

View explanation

The Kiso Range corresponds to the Central Alps. The Northern Alps are the Hida Range and the Southern Alps the Akaishi Range, the three together being known as the Japanese Alps. The Ōu Range runs the length of the Tōhoku region and is not among them.

Problem 10

The Ministry of Agriculture, Forestry and Fisheries reported national harvests for 2025 against the previous year as follows: - Wheat: down 1% - Two-row barley: up 28% - Six-row barley: up 7% - Naked barley: up 32%

Which showed the largest rate of increase in harvest over the previous year?

View explanation

Against the previous year, naked barley's 32% increase exceeds two-row barley's 28% and six-row barley's 7%. Wheat fell by 1% and so did not increase at all. The question compares rates of change from the previous year, not the size of the harvests themselves.