Aiki (martial arts principle) and its practice is often kept within a particular individual or two from a family/school lineage. Culturally, and due to certain necessities of the time period, the aiki knowledge was usually a very well guarded secret and rarely disclosed. The oldest book to have historically discuss aiki was the 1899 Budo Hiketsu-Aiki no Jutsu. On the subject of aiki it was written: The Textbook of Jujutsu (Jujutsu Kyoju-sho Ryu no Maki) from 1913 wrote: Aiki (martial arts principle) Aiki from a Japanese budo term, at its most basic is a principle that allows a conditioned practitioner to negate or redirect
Budo–Su-ngai Padi National Park Thailand; banded langurs, gray langurs, and northern spectacled langurs. All four species of langurs are endangered mammals. Budo–Su-ngai Padi National Park Budo–Su-ngai Padi National Park () is a national park in Narathiwat Province, Thailand. It is part of Sankala Khiri mountain range, the southernmost subrange of the Tenasserim Hills that stretches from the Kra Isthmus into Malaysia. The area was a haven for guerrillas and few people ventured in to see the natural jungle environment here. However, when the situation improved in 1974, the Royal Forest Department established Pacho Waterfall Park that became Budo–Su-ngai Padi National Park. The park has