In Photos: Nobel winner Tasuku Honjo over the years

Tasuku Honjo, distinguished professor at Kyoto University, speaks at a news conference at the university in Kyoto's Sakyo Ward on Oct. 1, 2018, after it was announced that he has won the Nobel Prize in physiology and medicine. (Mainichi/Ai Kawahira)

Tasuku Honjo, distinguished professor at Kyoto University, speaks at a news conference at the university in Kyoto's Sakyo Ward on Oct. 1, 2018, after it was announced that he has won the Nobel Prize in physiology and medicine. (Mainichi/Ai Kawahira)

Tasuku Honjo smiles during an interview with reporters from multiple news outlets in Kyoto's Sakyo Ward, on Sept. 27, 2017. (Mainichi/Yusuke Komatsu)

Tasuku Honjo chats with reporters during an interview with reporters from multiple news outlets in Kyoto's Sakyo Ward, on Sept. 27, 2017. (Mainichi/Yusuke Komatsu)

Tasuku Honjo speaks during an interview with reporters from multiple news outlets in Kyoto's Sakyo Ward on Sept. 27, 2017. (Mainichi/Yusuke Komatsu)

Tasuku Honjo speaks at a news conference after it was announced he would receive the Kyoto Prize, in Kyoto's Shimogyo Ward on June 17, 2016. (Mainichi/Yoshiyuki Hirakawa)

Tasuku Honjo holds a card reading "If one has clear aims, one can achieve anything," in Kyoto's Sakyo Ward on March 18, 2016. (Mainichi/Yusuke Komatsu)

Tasuku Honjo, first from left in front row, and his wife Shigeko, first from left in second row, are seen with actor Ken Takakura, first from right in front row, in this commemorative photo taken after an Order of Culture ceremony at the Imperial Palace in Tokyo, on Nov. 3, 2013. (Mainichi/Kan Takeuchi)

Tasuku Honjo speaks at a news conference after it was announced he would receive the Order of Culture, in Kyoto's Sakyo Ward, on Oct. 24, 2013. (Mainichi/Michiko Morizono)