~系
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Suffix attached to nouns to denote a system, lineage, or group. For example, 『教育系』 (kyouikukei, 'education system') or 『動物系』 (doubutsukei, 'animal group').
Theme

Two friends, Ken and User, are browsing a bookstore and discussing different genres of manga and light novels.

~系

~けい

~ system, ~ lineage, ~ group

Advanced ExpansionAbstract Concepts

Memory Hook

Think of a 'key' (系 sounds like 'key' in English) that unlocks a whole system or group — each key belongs to a specific lineage! 'Key' → 系 (kei, 'system / Lineage').

Cultural Note

In Japanese, 『系』 (kei, 'system / Lineage') is commonly used in academic and technical contexts, such as 『太陽系』 (taiyoukei, 'solar system') or 『血統系』 (kettoukei, 'bloodline'), reflecting structured classifications.

Forms

Base: ~系Suffix attached to nouns to denote a system, lineage, or group. For example, 『教育系』 (kyouikukei, 'education system') or 『動物系』 (doubutsukei, 'animal group').