Colorectal cancer (CRC), also known as bowel cancer, is a common cancer and a leading cause of death. Chemotherapy is a treatment option for CRC. It consists of one or more powerful medications to destroy cancer cells with the aim of prolonging life and reducing symptoms. These medications can cause side effects such as nausea, vomiting, infections, and high blood pressure. Sometimes these side effects can be so severe that patients stop or reduce their treatment. The safety and efficacy of these anti-cancer drugs are established from clinical trials, but, in daily clinical practice, patient outcomes are affected by various factors, such as general health, age, prior treatments, and lifestyle. Ramucirumab plus FOLFIRI is considered a standard treatment for CRC in patients who have disease progression after first-line treatment. In this study, we collected data from patients with CRC who were given ramucirumab plus FOLFIRI under routine clinical practice in Japan. Data were collected for 12 months from the start of treatment and based on various patient demographics such as age less than or greater than 75 years and treatment with a lower or higher dose of the anti-cancer drug irinotecan. We found that ramucirumab plus FOLFIRI is manageable in patients with CRC regardless of these patient demographics and initial irinotecan dose. This article aims to inform patients and primary care providers regarding real-world treatment outcomes to assist with CRC treatment decision making.