You will receive the NGC certified coin shown in the two pictures.

Details:
Composition:       Pure Gold (0.9999)
Weight:                20 grams
Diameter:            28 mm
References:        Y#158 - JNDA# 03-53

Obverse:

A phoenix over the Niju-bashi bridge

Reverse:

Imperial chrysanthemum crest


Lettering:

• 御在位二十年 •
日 本 国 • 1 万円 • 平成21年

Translation:
• 20 years of reign •
State of Japan • 10,000 Yen • Year 21 of Heisei


(above information from NUMISTA.COM)