At the same time, you can also enjoy beautiful Cosmos and Soba Flowers.
 
Tourist Info. 
There are parking and restroom. 
Admission: 410 Yen for Adult, 210 Yen for senior, 80 Yen for kids. There is a group discount. 
Open: 9:30 
Close: 17:00 (3/1 to 7/20 and 9/1 to 10/31), 18:00 (7/21 to 8/31), 16:30 (11/1 to end of Feb.) 
Close Day: Monday. 
Access 
0. at Mito Station. 
1. use JR Joban Line to Katuta station. 
2. use local bus to Hitachinaka Kaihinkoen.
410 JPY
3 hr.