Tenkyōkaku (天鏡閣) is a Western-style French Renaissance style residence built as a summer villa for Prince Arisugawa Takehito located in Inawashiro, Fukushima Prefecture, Japan.

In August 1907, while touring the Tōhoku region of northern Japan, Prince Arisugawa Takehito visited Lake Inawashiro and was impressed by the scenic beauty of the area.

The building was given its name "Tenkyōkaku" by Emperor Taishō when he visited as crown prince the following month, based on a Tang dynasty poem by Li Bai, which compared the waters of a lake to the "mirror of heaven".

In 1984, a large bronze statue of Prince Arisugawa, formerly located in front of the Naval Staff College in Tsukiji, Tokyo was relocated to the grounds of the villa.

Although incorporating some Japanese architectural elements and construction techniques, the structure is very western in appearance, with a white balcony and clapboard walls, and a luxurious interior containing a billiard room, marble mantelpieces and chandeliers.