Japanese Garden in the Horticulture Garden

From Official Catalogue

Block 1 is marked "Japan".  I've been wondering what was in it. Ran across the "Official Catalogue of Exhibitors Panama-Pacific International Exposition" while searching for Domoto (a local nursery) and PPIE.














Block 1 has these people in it:
GROUP 148 FRUIT CULTURE
Block 1
Horticulture Gardens

• Chiyoda Nursery Co -- Aichi - Citron and wild orange trees. 
• Ishiguro Kaichi -- Aichi.  Citron and wild orange trees.
• Kubo Buhei -- Hyogo. Wild orange trees. 
• Watase Torajiro -- Tokyo. Peach, pear, persimmon, and flowering crabapple trees. 
• Wada Tokuso -- Toyko. Peach, pear, persimmon, and flowering crabapple trees. 
• Yokohama Nursery Co -- Kanagawa. Flowers and plants. Av. A cor. 4th St (Syrica flower basket) Av. M (conservatory plants) Hort. Pal. 

Citron is a large citrus, Citrus medica, that is one of the four original citrus: citron, pomelo, mandarin, pepeda (wikipedia). Perhaps the "wild orange trees" are one of the other three original citrus?

References

• Japan and her exhibits at the Panama-Pacific International Exposition
• Official Catalogue of Exhibitors Panama-Pacific International Exposition