Question: Where did the subject of Wasao originate?

Context paragraphs:
Dhegihan History and Separation: The term "Dhegiha" refers to group from which the Omaha, Ponca, Kaw, Osage and Quapaw North American Tribes originate.  The timing of the separation for these tribes and history prior existence as separate groups is the subject of some debate.

Wasao: Wasao (わさお ) is a 2011 Japanese film that is based on a true story of an abandoned Akita Dog.

Akita (dog): The Akita (秋田犬 , Akita-inu, Akita-ken ) is a large breed of dog originating from the mountainous northern regions of Japan.  There are two separate varieties of Akita: a "Japanese" strain, commonly called "Akita Ken" in Japan, "Akita Inu" ("inu" means "dog" in Japanese), or "Japanese Akita"; and an "American" strain, known as the "Akita" or "American Akita".  The Japanese strain called the Akita Inu comes in a narrow palette of colors, with all other colors considered atypical of the breed, while the American strain known simply as the Akita comes in all dog colors.  The Akita has a short double-coat similar to that of many other northern spitz breeds such as the Siberian Husky, but long-coated dogs can be found in many litters due to a recessive gene.

Astronomy: Astronomy (from Greek: ἀστρονομία ) is a natural science that studies celestial objects and phenomena.  It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution.  Objects of interest include planets, moons, stars, galaxies, and comets; while the phenomena include supernova explosions, gamma ray bursts, and cosmic microwave background radiation.  More generally, all astronomical phenomena that originate outside Earth's atmosphere are within the purview of astronomy.  A related but distinct subject, physical cosmology, is concerned with the study of the Universe as a whole.

Gesture recognition: Gesture recognition is a topic in computer science and language technology with the goal of interpreting human gestures via mathematical algorithms. Gestures can originate from any bodily motion or state but commonly originate from the face or hand.  Current focuses in the field include emotion recognition from face and hand gesture recognition.  Users can use simple gestures to control or interact with devices without physically touching them.  Many approaches have been made using cameras and computer vision algorithms to interpret sign language.  However, the identification and recognition of posture, gait, proxemics, and human behaviors is also the subject of gesture recognition techniques.

Salala (band): Salala is an "a capella" vocal trio from the south of Madagascar.  They perform a contemporary form of the traditional "beko" genre, which originates from the island's southern interior.  In contrast to the traditional beko, a spiritual chant sung at funerals to honor the life of the deceased, Salala adapted the harmonies and style of the genre while shedding the religious purpose of the music by focusing the subject of their songs on matters of daily life.  The group was founded by one of the singers, M'Bassa, in 1983, with singer Senge and a friend.  All three performers belong to the southern Antandroy ethnic group and originate from a small village near Taolagnaro.  Over the next ten years, the group gained in popularity in Madagascar, eventually winning the "Gasitsara Media Prize" for Best Band of the Year.  Their first major domestic hit was "Salakao Raho Ene".  The group went on to perform the Africolor music festival in 1994, where they were well received.  In 1995 they recorded their first album, "Salala", and were selected to represent the Indian Ocean states at the "Découvertes du Printemps de Bourges" tour, performing at 25 venues across France and Germany with Oumou Sangaré.  After this success, the group's bass vocalist, Senge, launched a solo career, eventually teaming up with two other singers to lead his own trio, while still performing and recording with Salala.  The band toured Africa in 1996, visiting the Seychelles, Uganda, Kenya, Rwanda, Malawi, Zambia, Namibia and South Africa.  They performed at the third Jeux de la Francophonie in Madagascar in 1997 and toured Singapore in 1998.  In 1999, Salala toured Reunion island with Granmoun Lélé.

Supporting paragraphs: Wasao Akita (dog)
Answer: mountainous northern regions of Japan