Its wordings
Arbitration Act
Article 39, paragraph (2)
第三十九条第二項
Each amendment that changed this provision, and each that will, oldest first. Each is shown against the wording just before it; where an amendment gives the provision another number, it is followed under the new one. Read it as it stands today
In force today
A written arbitral award must state its reasons; provided, however, that this does not apply if otherwise agreed by the parties.
仲裁判断書には、理由を記載しなければならない。ただし、当事者間に別段の合意がある場合は、この限りでない。