The Spaniel Japones is known by several names that reflect its rich history and widespread appreciation across different cultures and regions. The most common English name for this breed is the Japanese Chin, which has been used since the breed gained international recognition in the nineteenth century. However, the breed has also been historically referred to as the Japanese Spaniel, a name that was commonly used in Western countries before the mid-twentieth century and is still occasionally encountered in older literature and documentation. Early breed enthusiasts in England and America used this spaniel designation despite the breed having no connection to hunting or sporting dogs.
In its country of development, Japan, the breed is simply known as Chin, with the character meaning something akin to a small dog of foreign origin. This single word carries significant cultural weight and distinguishes the breed from native Japanese dogs designated as inu. The name Chin itself likely derives from the Chinese word for dog, reflecting the breed's ancient origins in China rather than Japan. Spanish-speaking countries commonly refer to the breed as Spaniel Japones, while French speakers may use Epagneul Japonais. German speakers typically call the breed Japan Chin or Japanisches Hündchen. Italian fanciers use the term Chin Giapponese, and Portuguese speakers refer to the breed as Queixo Japonês.
The breed's alternative names also include descriptive terms used throughout history such as the Japanese Pug, a name that appeared in early Western references due to the breed's flat face and compact build. Some historical texts also reference these dogs as Sleeve Dogs, referring to the practice of Japanese nobility carrying their tiniest specimens in the voluminous sleeves of their kimonos. The designation as a lapdog of the Japanese aristocracy has also led to various romantic names in different languages that translate to Palace Dog or Royal Dog. Within the Japanese court, various regional names distinguished dogs from different noble households, though these designations did not survive into modern usage.
The modern standardization of the breed name to Japanese Chin occurred gradually through the twentieth century as kennel clubs worldwide sought consistency in breed nomenclature. The American Kennel Club officially changed the breed's name from Japanese Spaniel to Japanese Chin in 1977, reflecting the breed's unique characteristics that distinguish it from true spaniel breeds. This change acknowledged that despite the spaniel designation used for centuries, the breed shares no working heritage with hunting spaniels and represents an entirely distinct type of companion dog developed in Asian courts. The Kennel Club in the United Kingdom followed suit, and today the Japanese Chin designation is used by all major registries worldwide, though the historical names occasionally appear in vintage breed literature and informal discussion among enthusiasts.

