Information: Trypoxylus dichotomus, was initially described by Linnaeus (1771) from specimens collected in Southeast Asia (at the time referred to as Indiis) as Scarabaeus dichotom.
The Japanese rhinoceros beetle, Trypoxylus dichotomus, is widely distributed in China, Japan, the Korean Peninsula, Vietnam, Myanmar, Laos, India, and Thailand. It is typically found in broad-leaved forests in tropical and subtropical mountainous habitats. The Japanese rhi-noceros beetle has been important in Chinese traditional medicine for nearly 2000 years.
Ten sub-species of T. dichotomus and a related Trypoxylus species (T. kanamorii) have been described throughout Asia, but their taxonomic delimitations remain problematic.
Body length: 50 - 80 mm
Peak activity: May - August
Distribution: China, South Kore, North Korea, Laos, Myanmar, Japan, Thailand, Vietnam
Zoogeographic region: Palearctic, Oriental
Taxonomic classification:
The Scarabaeidae of Taiwan | Ching-Jin Yu 2000 The Dynastinae of the World | Endrödi 1985
Subspecies: 11
Information: Commonly identified to be T. d. tsunobosonis where tsunobosonis implies their thin pronotal horn in Latin. Cuticle coloration ranges from dark red to dark orange. Thinner pronotal horn compared to T. d. septentrionalis in Japan. Slightly smaller on average than T. d. dichotomus from mainland China. Large body size individuals are common, commonly and easily found on broad-leaved trees across Taiwan thereby light trap is not needed.
Body length: 50 - 80 mm
Peak activity: April - August
Remarks: The species is active on the light trap.
Distribution: Taiwan
Zoogeographic region: Palearctic
Material examined (& observation):
Our observation period: May ~ June
Sampling Methods: Attracted to light trap 
Distribution: China (Anhui, Beijing, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hong Kong, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Ningxia, Shandong, Shaanxi, Sichuan, Xizang, Yunnan, Zhejiang), Korea, Laos
Zoogeographic region: Palearctic, Oriental
Distribution: India (West Bengal)
Zoogeographic region: Oriental
Distribution: Japan (Kumejima Island, Ryukyu Islands)
Zoogeographic region: Palearctic
Distribution: Myanmar, Thailand, Vietnam, Yunnan (China) and Laos
Zoogeographic region: Palearctic
Distribution: Northeast of China; Korean Peninsula; Jeju Island; Japan (Honshu, Shikoku, Kyushu, Hokkaido, and some other small islands of Japan)
Zoogeographic region: Palearctic
Distribution: China (Hubei, Shennongjia)
Zoogeographic region: Palearctic
Distribution: Japan (Yakushima Island and Tanegashima)
Zoogeographic region: Palearctic
Distribution: Japan (Mainland of Okinawa; Ryukyu Islands)
Zoogeographic region: Palearctic
Distribution: Japan (Kuchinoerabu-jima Island)
Zoogeographic region: Palearctic
Distribution: China (Xizang, Gamdo City, Tibe)
Zoogeographic region: Palearctic
A very closely related species:
Distribution: Northwest of Myanmar, India, China (Tibet, Yunnan)
Zoogeographic region: Oriental
Taiwan (Province of China)
