The , abbreviated as JSPC, formed by the

Japan Automobile Federation The is an automobile association based in Minato, Tokyo. Founded in 1963, the main purpose of the organization is to handle various businesses related to automobiles, and to protect the interests of owners and drivers in Japan. , the organization ...

, was a domestic championship which took place in

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

for

Group C Group C was a category of sports car racing introduced by the FIA in 1982 and continuing until 1993, with ''Group A'' for touring cars and ''Group B'' for GTs. It was designed to replace both Group 5 special production cars (closed top touri ...

and

IMSA GTP IMSA GT was a sports car racing series organized by International Motor Sports Association. Races took place primarily in the United States, and occasionally in Canada. History The series was founded in 1969 by John and Peggy Bishop, and Bill ...

prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...

cars and also featured cars that were eligible for

touring car racing Touring car racing is a motorsport road racing competition with heavily modified road-going cars. It has both similarities to and significant differences from stock car racing, which is popular in the United States. While the cars do not move ...

in its earlier years. Class A and Class B for production cars which were defined by the

FIA FIA is the Fédération Internationale de l'Automobile (English: International Automobile Federation), the world's governing body for all forms of motor sport where four or more wheels are used. Fia or FIA may also refer to: People * Fia Backst ...

(

Group A Group A is a set of motorsport regulations administered by the FIA covering production derived vehicles intended for competition, usually in touring car racing and rallying. In contrast to the short-lived Group B and Group C, Group A vehicles w ...

and

Group B Group B was a set of regulations for grand touring (GT) vehicles used in sports car racing and rallying introduced in 1982 by the Fédération Internationale de l'Automobile (FIA). Although permitted to enter a GT class of the World Sportscar ...

) and the lead category, Class C would be for cars that are similar to IMSA's Camel Lights and the WEC's C2, whereas Class D was for C1/GTP cars. The series began in 1983 as All Japan Endurance Championship, an endurance championship with an intention to replace its domestic touring car championship and started out as a three-round event, including one which as it was part of the WEC round which meant drivers competing in the national series was counted into the world championship. In 1987, the championship would be broken up into two as production cars from the lower categories would be moved into the All Japan Touring Car Championship (now

Super GT Super GT (stylized as SUPER GT) is a grand touring car racing series that began in 1993. Launched as the , generally referred to as either the JGTC or the All Japan Grand Touring Car Championship, the series was renamed to Super GT in 2005. It is ...

) formed two years earlier to become a dedicated championship and was renamed the All Japan Sports Prototype Car Endurance Championship. The series was noted throughout its ten-year run for battles between the various

Porsche 956 The Porsche 956 was a Group C sports-prototype racing car designed by Norbert Singer and built by Porsche in 1982 for the FIA World Sportscar Championship. It was later upgraded to the 956B in 1984. In 1983, driven by Stefan Bellof, this car est ...

/ 962C and Japanese manufacturers presented by works teams of Toyota, Nissan and Mazda. Due to waning popularity and seeking to prevent the spiraling budgets and the disappearance of Gr. C and IMSA GTP, the JAF would dissolve the series at the end of 1992 and for the following year replace the series with the

All Japan Grand Touring Car Championship All Japan Grand Touring Car Championship is a grand touring car racing series that began in 1993. Originally titled as the , generally referred to as either the JGTC the series was renamed to Super GT in 2005. It was the top level of sports car r ...

, using GT cars such as those in secondary classes as major international sportscar series worldwide favoured the grand tourers (similar to IMSA's lower GTS and GTU classes). This was not to be the end for Group C cars as they would be allowed to compete in the newly formed series for two more years before being banished altogether. Major sportscar racing in Japan would return again in 2006 with the short-lived Japan Le Mans Challenge.

Champions

{, class="wikitable" ! rowspan=2 , ! colspan=2 , Winning Driver(s) , - ! colspan=2 , Winning Manufacturer , - ! rowspan=2 , 1983 , colspan=2 ,

Vern Schuppan Vernon John Schuppan (born 19 March 1943) is a retired Australian motor racing driver. Schuppan drove in various categories, participating in Formula One, the Indianapolis 500 and most successfully in sports car racing. Although he consider ...

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Porsche Dr. Ing. h.c. F. Porsche AG, usually shortened to Porsche (; see #Pronunciation, below), is a German automobile manufacturer specializing in high-performance sports cars, SUVs and sedans, headquartered in Stuttgart, Baden-Württemberg, Germany ...

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1984 Events January * January 1 – The Bornean Sultanate of Brunei gains full independence from the United Kingdom, having become a British protectorate in 1888. * January 7 – Brunei becomes the sixth member of the Association of Southeast A ...

, colspan=2 ,

Naoki Nagasaka Naoki Nagasaka (長坂尚樹、born 24 April 1953) is a Japanese former racing driver. He has competed professionally in several Japan championships from the 1970s to the 1990s. He won the Japanese Touring Car Championship The Japanese Touring C ...

, - , colspan=2 , Lotec- BMW , - ! rowspan=2 ,

1985 The year 1985 was designated as the International Youth Year by the United Nations. Events January * January 1 ** The Internet's Domain Name System is created. ** Greenland withdraws from the European Economic Community as a result of a ...

, colspan=2 ,

Kunimitsu Takahashi was a Japanese professional motorcycle road racer, racing driver, and team manager. Nicknamed "Kuni-san", he is known as the "father of drifting". His racing career lasted from 1958 to 1999. He competed on motorcycles between 1958 and 1963, ...

, - , colspan=2 ,

, - ! rowspan=2 ,

1986 The year 1986 was designated as the International Year of Peace by the United Nations. Events January * January 1 ** Aruba gains increased autonomy from the Netherlands by separating from the Netherlands Antilles. **Spain and Portugal ente ...

, colspan=2 ,

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, - ! rowspan=2 ,

1987 File:1987 Events Collage.png, From top left, clockwise: The MS Herald of Free Enterprise capsizes after leaving the Port of Zeebrugge in Belgium, killing 193; Northwest Airlines Flight 255 crashes after takeoff from Detroit Metropolitan Airport, k ...

, colspan=2 ,

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1988 File:1988 Events Collage.png, From left, clockwise: The oil platform Piper Alpha explodes and collapses in the North Sea, killing 165 workers; The USS Vincennes (CG-49) mistakenly shoots down Iran Air Flight 655; Australia celebrates its Australian ...

, colspan=2 , Hideki Okada , - , colspan=2 ,

, - ! rowspan=2 , 1989 , colspan=2 ,

, - , colspan=2 ,

, - ! rowspan=2 ,

1990 File:1990 Events Collage.png, From left, clockwise: The 1990 FIFA World Cup is played in Italy; The Human Genome Project is launched; Voyager I takes the famous Pale Blue Dot image- speaking on the fragility of Humankind, humanity on Earth, Astroph ...

, colspan=2 ,

Masahiro Hasemi is a former racing driver and team owner from Japan. He started racing motocross when he was 15 years old. In 1964 he signed to drive for Nissan. After establishing himself in saloon car and GT races in Japan, he participated in his only Formula ...

, - , colspan=2 ,

Nissan , trade name, trading as Nissan Motor Corporation and often shortened to Nissan, is a Japanese multinational corporation, multinational Automotive industry, automobile manufacturer headquartered in Nishi-ku, Yokohama, Japan. The company sells ...

, - ! rowspan=2 ,

1991 File:1991 Events Collage.png, From left, clockwise: Boris Yeltsin, elected as Russia's first president, waves the new flag of Russia after the 1991 Soviet coup d'état attempt, orchestrated by Soviet hardliners; Mount Pinatubo erupts in the Phil ...

, colspan=2 ,

Kazuyoshi Hoshino is a Japanese former racing driver and businessman. Motorsport career Hoshino's nickname was . He won the Japanese motocross national championships in the 90cc and 125cc classes for Kawasaki in 1968 before switching to cars as a Nissan facto ...

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, - ! rowspan=3 ,

1992 File:1992 Events Collage V1.png, From left, clockwise: 1992 Los Angeles riots, Riots break out across Los Angeles, California after the Police brutality, police beating of Rodney King; El Al Flight 1862 crashes into a residential apartment buildi ...

! C Class ! C1 Class , - , Geoff Lees ,

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Toyota is a Japanese multinational automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on . Toyota is one of the largest automobile manufacturers in the world, producing about 10 ...

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Sports car racing series Auto racing series in Japan Group C National championships in Japan