Japanese translation updated by Go MAEDA (#17166)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013180
Gemfile: pin request_store version 1.0.5 (#16685)

Many integration tests are broken.

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013181