Per Japanese census data,[2] the population of Ōguchi has increased steadily over the past 50 years.
Historical population
Year
Pop.
±%
1940
7,206
—
1950
8,695
+20.7%
1960
10,163
+16.9%
1970
14,898
+46.6%
1980
16,195
+8.7%
1990
17,464
+7.8%
2000
20,633
+18.1%
2010
22,447
+8.8%
Climate
The town has a climate characterized by hot and humid summers, and relatively mild winters (Köppen climate classificationCfa). The average annual temperature in Ōguchi is 15.6 °C. The average annual rainfall is 1819 mm with September as the wettest month. The temperatures are highest on average in August, at around 28.0 °C, and lowest in January, at around 4.1 °C.[3]
History
The villages of Kashiwamori, Ōta, Ōguchi and Tominari were created within Niwa District, Aichi with the establishment of the modern municipalities system in 1889. On October 1, 1906 Ōta, Ōguchi and Tominari and a portion of Kashiwamori merged to form the village of Ōguchi. It was raised to town status in 1962.
Ōguchi has three public elementary schools and one public junior high school operated by the town government, and one public high school operated by the Aichi Prefectural Board of Education..
Transportation
Railway
Ōguchi is not served by passenger rail transport. The nearest train station is Kashiwamori on the Meitetsu Inuyama Line in neighboring Fusō.