Get:1 http://jp.archive.ubuntu.com/ubuntu zesty InRelease [243 kB]
Get:2 http://jp.archive.ubuntu.com/ubuntu zesty-updates InRelease [89.2 kB]
Hit:3 http://jp.archive.ubuntu.com/ubuntu zesty-backports InRelease
Get:4 http://security.ubuntu.com/ubuntu zesty-security InRelease [89.2 kB]
Fetched 421 kB in 1s (289 kB/s)
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Building dependency tree
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All packages are up to date.