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Article History

Received: 30 April 2024

Accepted: 2 December 2024

First Online: 9 December 2024

Declarations

:

: All the procedures performed in studies involving human participants were carried out in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.

: For this type of study, formal consent is not required.

: Not applicable.

: MO, ES and YT have nothing to declare. JK has received honoraria from Chugai, Astellas, Ono Pharma, Bristol-Myers Squibb, Daiichi Sankyo, Taiho, Terumo, Eli Lill, and Nipponkayaku. ET has received honoraria from Pfizer., Sanofi, MSD, Eisai, Chugai, TAIHO, Johnson & Johnson, and AstraZeneca. KT has received grants and/or and contracted clinical trials from Chugai, Eisai, Taiho, Takeda, MSD, Daiichi Sankyo, Eli Lill, Asahi Kasei, Nipponkayaku, Kyowa Kirin, Asteras, and Maruho; honoraria from Chugai, Astra Zeneca, Pfizer, Eisai, Daiichi Sankyo, Eli Lill, Novartis, MSD, Nipponkayaku, Hisamitsu, Kyowa Kirin, Asahi Kasei, Taiho, and PDR Pharma. TO has received grants and/or contracted clinical trials from Chugai, Eisai, Taiho, Takeda, Asahi Kasei, Daiichi Sankyo, Eli Lilly, Nipponkayaku, Kyowa Kirin; honoraria from Chugai, Pfizer, Astra Zeneca, Eisai, Daiichi Sankyo, Eli Lilly, Kyowa Kirin, Novartis, FUJIFIRM Toyama Chemical, Johnson & Johnson, Asahi Kasei, Exact Sciences, Otsuka, and MSD. SS has received grants and/or contracted clinical trials from Taiho, Eisai, Chugai, Takeda, MSD, Astra Zeneca, Daiichi Sankyo, Gilead, Eli Lilly, and Sanofi; honoraria from Chugai, Kyowa Kirin, MSD, Novartis, Eisai, Takeda, Daiichi Sankyo, Eli Lilly, Astra Zeneca, Pfizer, Taiho, Ono, Nipponkayaku, Gilead, and Exact Sciences; participation on a data safety monitoring board or advisory board for Chugai/Roche, Astra Zeneca, Eli Lilly, Pfizer, Kyowa Kirin, Daiichi Sankyo, and MSD; and executive board membership of Japan Breast Cancer Research Group, Japan Breast Cancer Society, Japanese Society of Medical Oncology, and Breast International Group.