"左利き" (left-handedness) refers to individuals who primarily use their left hand for tasks such as writing, eating, and throwing. This trait is observed in about 10% of the global population. Left-handed people may face challenges in a world designed for right-handed individuals, such as using tools and writing instruments. Left-handedness is often linked to brain lateralization, where the right hemisphere is more dominant in left-handed individuals. Famous left-handed people include レオナルド・ダ・ヴィンチ and バラク・オバマ. Understanding left-handedness can help promote inclusivity and accommodate diverse needs in various settings.