Following renowned swimmer Rikako Ikee¡¯s announcement of her leukemia diagnosis, public interest in donating bone marrow has increased, especially in Hiroshima Prefecture, which has more than its fair share of patients as a result of the atomic bombing in 1945.

In Hiroshima, though, the eligible donors are getting older, forcing officials to hammer out plans to find new donors.

Bone marrow provides blood-forming cells for individuals with such diseases as leukemia. In the prefecture, a little over 60 percent of all donors are in their 40s or 50s, with the ratio of those in their 20s or 30s below the national average.