Medical Articles
October Is Breast Cancer Awareness Month
11.10.2026
“An ume plum seed,” “a ginkgo nut,” and “a marble.” When you picture these three objects, most people would probably imagine them as being about the same size. This is one of the unique aspects of breast cancer: it is one of the few cancers that may sometimes be detected by noticing a lump or other changes in the breast. By now, many of you may have guessed what we are talking about. Yes, breast cancer.
October is Breast Cancer Awareness Month, when campaigns around the world raise awareness of breast cancer and encourage people to undergo screening and learn about the importance of early detection. The pink ribbon is widely recognized as a symbol of breast cancer awareness, which is why October is also known as Pink Ribbon Month. When breast cancer is detected early, there are generally more treatment options available. October is therefore not simply a month to learn about breast cancer; it is also an opportunity to think about your own health and the health of your family and loved ones.
One of the most common signs of breast cancer is a lump in the breast. A cancerous lump may feel hard, have an irregular surface, or have unclear edges. Some data suggest that approximately 45–50% of breast lumps are found in the upper outer area of the breast. In recent years, a number of well-known public figures have also undergone surgery for breast cancer. This reminds us just how close to home this disease can be. In Japan, the lifetime risk of being diagnosed with breast cancer among women is 11.8%, or approximately one in eight. The number of cases begins to increase from the late 30s and is particularly high among women aged 40 and older. Although breast cancer is much less common in men, men can also develop breast cancer because they have breast tissue as well.
Breast cancer survival rates have been improving in recent years, thanks in part to advances in early detection and treatment. Because breast cancer is one of the few cancers in which changes can sometimes be noticed by the individual, it is important to become familiar with the normal appearance and feel of your breasts and to consult a medical professional if you notice any changes. However, being aware of changes in your breasts alone cannot detect every case of breast cancer, so regular screening is also recommended. In Japan, women aged 40 and older are generally recommended to have a mammogram once every two years.
Author Bio
Dr. Vivien
Medical Director/Family Medicine Specialist
After completing medical school in Moscow, Dr. Vivien gained clinical experience at a general hospital in Penang, Malaysia. She later served as a full-time physician at Batu Gajah Hospital in Perak and at a clinic in Selangor.
Since 2018, she has been with Hibari Clinic, where she currently serves as Medical Director and is dedicated to providing care for the local community. She has a strong interest in pediatrics and psychosomatic medicine, and values patient-centered care that respects each individual’s needs.