The license referred to in Article 80, paragraph (1) ceases to be effective if a financial instruments exchange falls under any of the following items:
the number of trading participants falls to five or below (but only if it is an incorporated financial instruments exchange);
取引参加者の数が五以下となつたとき（株式会社金融商品取引所の場合に限る。）。
it closes all of its financial instruments exchange markets;
取引所金融商品市場の全部を閉鎖したとき。
it is dissolved;
解散したとき。
a judgment invalidating its incorporation, merger (but only if the person incorporated in the merger is a financial instruments exchange), or incorporation-type company split (but only if the person incorporated in the incorporation-type company split is that financial instruments exchange) becomes final and binding; or
設立、合併（当該合併により設立される者が金融商品取引所であるものに限る。）又は新設分割（当該新設分割により設立された者が当該金融商品取引所であるものに限る。）を無効とする判決が確定したとき。
it does not operate a financial instruments exchange market within six months from the date on which it obtains the license (unless there is any compelling reason and it has obtained the approval of the Prime Minister in advance).
免許を受けた日から六月以内に取引所金融商品市場を開設しなかつたとき（やむを得ない理由がある場合において、あらかじめ内閣総理大臣の承認を受けた場合を除く。）。
If a license ceases to be effective pursuant to item (i) or (iv) of the preceding paragraph, the representative or the former representative of the financial instruments exchange must notify the Prime Minister of this without delay.
Read this with the articles around it
(Expiry of License)
the number of trading participants falls to five or below (but only if it is an incorporated financial instruments exchange);
取引参加者の数が五以下となつたとき（株式会社金融商品取引所の場合に限る。）。
Open this provision(Expiry of License)
a judgment invalidating its incorporation, merger (but only if the person incorporated in the merger is a financial instruments exchange), or incorporation-type company split…
設立、合併（当該合併により設立される者が金融商品取引所であるものに限る。）又は新設分割（当該新設分割により設立された者が当該金融商品取引所であるものに限る。）を無効とする判決が確定したとき。
Open this provision(Licensing)
With the exception of an authorized financial instruments firms Association, a person must not operate a financial instruments market unless it is licensed by the Prime Minister.
金融商品市場は、認可金融商品取引業協会を除き、内閣総理大臣の免許を受けた者でなければ、開設してはならない。
Open this provisionfinancial instruments exchange
「金融商品取引所」
A membership corporation (金融商品会員制法人) or stock company (株式会社) licensed by the Prime Minister under Article 80, paragraph (1) to open a financial instruments market (金融商品市場).
Defined inArticle 2, paragraph (16)· applies throughout the law
financial instruments exchange market
「取引所金融商品市場」
A financial instruments market (金融商品市場) opened by a financial instruments exchange (金融商品取引所).
Defined inArticle 2, paragraph (17)· applies throughout the law
incorporated financial instruments exchange
「株式会社金融商品取引所」
A stock company that operates a financial instruments exchange market.
Short name set inArticle 2, paragraph (18)
trading participant
「取引参加者」
A person that may take part in purchases and sales of securities or market derivatives transactions (市場デリバティブ取引) on a financial instruments exchange market (取引所金融商品市場) under a trading qualification granted under Article 112, paragraph (1) or (2) or Article 113, paragraph (1) or (2).
Defined inArticle 2, paragraph (19)· applies throughout the law
Prime Minister
内閣総理大臣
The head of the Cabinet. Designated by the Diet from among its own members, and appointed by the Emperor on that designation (Articles 67 and 6). The Prime Minister appoints and may dismiss the other Ministers of State at will, and a majority of them must be members of the Diet (Article 68). No Minister of State can be subjected to legal action while in office without the Prime Minister's consent (Article 75).
Written by AI using Constitution, Arts. 6, 67, 68, 75 and Wikipedia: Prime Minister of Japan as a reference.