is a city located in Saitama Prefecture, Japan. , the city had an estimated population of 79,123 in 35,440 households and a population density of 410 persons per km<sup>2</sup>. The total area of the city is .
Hannà  is located on the southern border of Saitama Prefecture, bordered by Tokyo to the south and Chichibu to the west. Both the Iruma River and the Koma River flow through the city. Hannà  is mainly made up of urban and suburban areas, surrounded by mountains and rivers.
Hannà  has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Hannà  is 12.6 ðC. The average annual rainfall is 1408 mm with September as the wettest month. The temperatures are highest on average in August, at around 24.9 ðC, and lowest in January, at around 1.0 ðC.
Per Japanese census data, the population of Hannà  peaked around the year 2000 and has declined slightly over the past 20 years.
Hannà  was traditionally noted for its lumber industry, which developed during the Edo period to supply Edo with timber needed for rebuilding after its frequent fires. The town of Hannà  was established within Koma District, Saitama with the establishment of the modern municipalities system on April 1, 1889. Koma District was abolished in 1896, becoming part of Iruma District.
Hannà  annexed the neighboring villages of Seimei, Minami-Koma, Kaji and Moto-Kaji on April 1, 1943. It was elevated to city status on January 1, 1954. Hannà  annexed the neighboring villages of Agano, Gigshi-Agano, Haraichiba on September 30, 1956. On January 1, 2005, the village of Naguri was merged into Hannà Â.
The economy of Hannà  is mixed, with a number of pharmaceutical firms and electronics firms maintaining factories in the area. A substantial fraction of the population commutes to Tokyo every day.
Hannà  has a mayor-council form of government with a directly elected mayor and a unicameral city council of 19 members. Hannà  contributes one member to the Saitama Prefectural Assembly. In terms of national politics, the city is part of Saitama 9th district of the lower house of the Diet of Japan.
JR East â Hachiko Line
Seibu Railway - Seibu Ikebukuro Line/Seibu Chichibu Line
The anime series Encouragement of Climb and Train to the End of the World are set in Hannà Â.