How to contact a mangaka

More specifically i want to send him a letter.Can anyone tell me how to contact Kagami Yoshimizu??He's known for Lucky Star and i would like to send him a letter,if anyone can tell me how to send it personally to him.Thank you for the help.

〒102-8177　東京都千代田区富士見2-13-3
コンプティーク編集部気付　美水かがみ先生宛

or

To KAGAMI YOSHIMIZU sensi
KADOKAWA Comptiq henshu-bu
102-8177
JAPAN

Thank you!If i clearly print the numbers and JAPAN then i will be able to send it to him??

@ Davidandreis
That address is correct
write both EN(upper) then JP(lower) better.
http://www.kadokawa.co.jp/help/
著者・編者連絡先について

But this address is Magazine "コンプティーク/Comptiq" publishing office of Kadokawa.
https://web-ace.jp/comptiq/
https://web-ace.jp/comptiq/contents/81/
http://ir.kadokawa.co.jp/global/outline.php
No announced each author's working location.
Maneging fan letters is one of important publisher's work.
Read "Bakuman./バクマン。" for understanding about publisher works.
https://en.wikipedia.org/wiki/Bakuman
Also both are very funny as comedy.
https://en.wikipedia.org/wiki/Monthly_Girls%27_Nozaki-kun
https://en.wikipedia.org/wiki/The_Comic_Artist_and_His_Assistants
(TV Animation better)
-------------------------------------
To KAGAMI YOSHIMIZU Sensei
KADOKAWA, henshu-bu
Tokyo, 102-8177
JAPAN
-------------------------------------
〒102-8177
東京都千代田区富士見 2 - 13 - 3
コンプティーク編集部気付
美水かがみ 先生 宛
-------------------------------------
Don't use Vertical writing for internatinal mail.
http://www.post.japanpost.jp/int/use/writing/normal_en.html
Now most big companies that mail delivered daily huge amounts
no need company location full address 千代田区(Chiyoda ward)....

Strange(?) symbol 〒 means "postal mark =Postal code/Zip code"
calling "郵便記号/yuubin-kigou" in Japanese.
https://en.wikipedia.org/wiki/Japanese_postal_mark
This 7 numbers code scanned by high speed selecting machine like this.
https://youtu.be/EUFvnNWjsAw

And you should follow the Comptiq official Twitter if yet.
https://twitter.com/comptiq
---------------------------------------------------
@ tokyo friend 48
Don't forget 2nd "s" sen(s)ei.
But he may also The Warrior "Sensi/戦士" as Mangaka :)

〒102-8177　東京都千代田区富士見2-13-3
コンプティーク編集部気付　美水かがみ先生宛
JAPAN

or

To KAGAMI YOSHIMIZU sensei(Lucky Star)
KADOKAWA COMPTIQ henshu-bu
102-8177
JAPAN