Per Japanese census data,[2] the population of Higashiizu has been in slow decline over the past 40 years.
Historical population
Year
Pop.
±%
1940
10,118
—
1950
13,310
+31.5%
1960
15,246
+14.5%
1970
16,220
+6.4%
1980
17,030
+5.0%
1990
16,719
−1.8%
2000
15,807
−5.5%
2010
14,065
−11.0%
Climate
The city has a climate characterized by hot and humid summers, and relatively mild winters (Köppen climate classificationCfa). The average annual temperature in Higashiizu is 16.2 °C (61.2 °F). The average annual rainfall is 2,357.6 mm (92.82 in) with June as the wettest month. The temperatures are highest on average in August, at around 26.0 °C (78.8 °F), and lowest in January, at around 6.9 °C (44.4 °F).[3]
Climate data for Inatori, Higashiizu (1991−2020 normals, extremes 1978−present)
During the Edo period, all of Izu Province was tenryō territory under direct control of the Tokugawa shogunate, and the area now comprising Higashiizu Town consisted of 5 villages (Inatori, Naramoto, Shirata, Katase, and Ōkawa). With the establishment of the modern municipalities system in the early Meiji period in 1889, the area was reorganized into two villages (Inatori and Jōtō) with Kamo District. Inatori was elevated in status of that of a town in December 1920. The town of Higashiizu was founded on May 3, 1959 through the merger of the town of Inatori with the village of Jōtō.
Higashiizu has three public elementary schools and two public junior high schools operated by the town government, and one public high school operated by the Shizuoka Prefectural Board of Education.
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