Oct. 1 marks the start of the annual Pink Ribbon campaign to raise awareness about breast cancer.

Pretty in pink: Tokyo Skytree is illuminated in pink on Oct. 1 last year to mark the beginning of breast cancer awareness month.
Pretty in pink: Tokyo Skytree is illuminated in pink on Oct. 1 last year to mark the beginning of breast cancer awareness month. | COURTESY OF ESTEE LAUDER COMPANIES

To highlight the beginning of the campaign, prominent landmarks such as the Tokyo Skytree, Tokyo Metropolitan Government building, Himeji Castle in Hyogo Prefecture and Kobe Port Tower will be illuminated in pink.