Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Party | Diet Representation\nRepresentatives | Diet Representation\nCouncillors | Party Leader(s) | Comments |
| --- | --- | --- | --- | --- |
| Your Party (YP)\nMinna no Tō みんなの党\n("Everybody's Party") | 18 | 18 | Yoshimi Watanabe Reps. | Conservative liberalism, Neoliberalism, Economic liberalism, Libertarianism, Anti-nuclear |
| Japanese Communist Party (JCP)\nNihon Kyōsan-tō 日本共産党 | 8 | 11 | Kazuo Shii Reps. | The Japanese Communist Party is Japan's oldest party. It was formed in 1922 as an underground organization in the Empire of Japan, but was legalized after World War II during the Occupation. It used to be a communist party, but the party has recently shifted to a socialist party. |
| People's Life Party (PLP)\nSeikatsu no Tō 生活の党 | 7 | 2 | Ichirō Ozawa Reps. | Life Party was founded by Ichirō Ozawa and 14 other diet members who were in the Tomorrow Party of Japan after a leadership dispute between Ozawa and Yukiko Kada. |
| Social Democratic Party (SDP)\nShakai Minshu-tō 社会民主党 | 2 | 3 | Mizuho Fukushima Coun. | SDP is a social democratic party. It is a successor of Japan Socialist Party, which had been Japan's largest opposition party in the 1955 System |
| Green Wind\nMidori no Kaze みどりの風 | 2 | 0 | Kuniko Tanioka Coun. | A House of Councillors parliamentary group founded in July 2012, temporarily registered as a party from November to December 2012, opposed to joining TPP, VAT increase, nuclear power. May merge with Tomorrow Party of Japan in the near future. |
| New Party Daichi – True Democrats\nShintō Daichi – Shinminshu 新党大地・真民主 | 1 | 0 | Muneo Suzuki | founded in December 2011 by New Party Daichi and ex-Democrats, Hokkaidō regionalism, opposed to joining TPP |
| New Renaissance Party (NRP)\nShintō Kaikaku 新党改革\n("New Reform Party") | 0 | 1 | Yōichi Masuzoe Coun. | Conservatism, Neoliberalism |
| Okinawa Socialist Masses Party (OSMP)\nOkinawa Shakai Taishūtō 沖縄社会大衆党 | 0 | 1 | Keiko Itokazu Coun. | social democracy, Okinawa regionalism |
Question:
according to this table, which party is japan's oldest political party?
Answer:
Japanese Communist Party (JCP) Nihon Kyōsan-tō 日本共産党