Japanese Gardens in Minnesota

A few 日本庭園 located in MN:

• Normandale College's Japanese Garden
• Carlton College's Japanese Garden, 静聆園
• Minnesota Landscape Arboretum, 清水庭 (not sure if I guessed at the kanji for "seisuitei" correctly...)
• Como Park Zoo & Conservatory's Japanese Garden

Apparently there's also a landscaping company, Niwa Design Studio, that specializes in Japanese-style design.