Adzuki beans were found to be estrogenic and to promote the growth of breast cancer tumor lines in vitro. This does not mean that you should never eat Adzuki beans. In fact, if you do not have cancer they can be useful for many things, including detoxification and infertility. Talk to a knowledgeable nutritionist to see if they are appropriate for you in your case.
 
Zhongguo Zhong Yao Za Zhi. 2006 Aug;31(15):1261-5. [Estrogenicity of adzuki bean Phaseolus angularis wight. and its effect on proesterone receptor level in human breast cancer MCF-7 cells][Article in Chinese]. Zhang XG, Zhao QW.