Iharahiromasa developed features and fixes across multiple open source repositories, focusing on reliability and efficiency in automotive and infrastructure software. In Orange-OpenSource/community.zabbix, he corrected ARM architecture mapping for Debian packaging, reducing deployment failures on ARM-based systems. For gradle/gradle, he enhanced the developer experience by adding a PlainWithColor console output option, improving log clarity using Groovy and Java. In grafana/loki, he implemented gzip compression for Fluentd HTTP payloads, optimizing data transmission with Python and plugin development skills. He also expanded mvl-boston/opendbc to support the Honda N-Box 2018, integrating CAN protocol knowledge and embedded systems expertise.