1974 – 3rd All Japan Championships: Kumite Team Champion;
1974 – 1st IKAF World Championships ( Los Angeles ): Overall Team Champion. Kata Team Champion, Kumite Team Champion;
1975 – 18th National Karate Championships: Kumite Semifinalist;
1976 – 19th National Karate Championships: Kumite 3rd Place;
1976 – 2nd IAKF World Championships ( Japan ): Kata Team Champion/Individual Semifinalist, Kumite Champion;
1978 – 21st National Championships: Kata Semifinalist/ kumite Semifinalist;
1980 – 1st International Karate Championships ( Egypt ); Kata Individual Champion, Kumite Individual Champion;
1980 – 3rd National karate Championships: Kata Semifinalist;
1980 – 3rd IKAF World Championships ( Germany ): Kata Team Champion/Individual Semifinalist, Kumite Team Champion;
1981 – 24th National Karate Championships: Kata Semifinalist;
1982 – 25th National Karate Championships: kata Semifinalist, Kumite 3rd place.;
1983 – 2nd Asia Cup ( Indonesia ): Individual Kata Champion;
1983 – 26th National Karate Championships: Kata Semifinalist;
1983 – 4th IKAF World Championships ( Egypt ): Kata Team Champion/Individual Semifinalist, Kumite Team Champion;
1984 – 1st JKA World Cup Championship ( Hungary ): Kata individual Champion;
1984 – 27th National Karate Championships: Overall Champion: Kata Champion, Kumite 3rd place.
Nowadays, Yahara Sensei is KWF – Karate no Michi World Federation’s Chief Instructor, where he transmits all of his knowledge and studies, accompanied by a World known technical team:
Isaka Sensei (8th Dan, KWF’s Chief Instructor’s assistant)
Malcolm Dorfman Sensei (8th Dan, KWF’s Chief Instructor’s assistant)
Hizumi Sensei (7th Dan, member of the Masters Supreme Board)
Kawasaki Sensei (6th Dan, technical Director)
Tamang Sensei (6th Dan, international Director and one of the few westerners who finished JKA’s Instructors Class)