How to do this archive thing please

I use a plugin called Smart Archives to achieve something similar to the top part. It lists links to the months, categorized by year, but also lists out lists of titles below that.

The plugin is here: https://justinblanton.com/projects/smartarchives/

The part in the sidebar just looks like the output of the WordPress template tag get_calendar(), localized to be in Japanese.

thanks so much aurgonaut, MANY MANY thanks for your help.