Donation by PayPal in Japan is not legally permitted. I am glad if you will buy the following plugin by about $5 instead of donation.
This plugin was made for checking when developing various plugins. It is not practical for many people. It is light plugin. Please use it if you like.

=== Admin Bar Watch ===
Requires WordPress Version: 3.0.1
Requires PHP Version: 5.3.0
Tested up to: 4.9
Version: 1.00

== Description ==
Display the clock and stopwatch in the admin bar.

== Screenshots ==

== Installation ==
1. Upload `admin-bar-watch` directory to the `/wp-content/plugins/` directory
2. Activate the plugin through the ‘Plugins’ menu in WordPress

== Downloads ==