In 1961, digital clocks were installed at the height of 65 metres from the ground, which were donated by Matsushita Electric Industrial Co., a Japanese electronics manufacturer. This installation was suggested by the founder of the company Konosuke Matsushita, who thought that these digital clocks would draw a great attention to the Tower. These digital clocks, installed at four sides of the Tower, have been repaired two times: in 1998 and 2006. The interior and exterior of the Sapporo TV Tower were renovated in 2002, and the color of walls at the second and third floors were then changed from pale green to dark green. In the second repair of the digital clocks in 2006, the light-emitting diode was adopted, and the advertisement right below the clocks was changed from the "National" to "Panasonic".