This is an item from the Meiji era to the Taisho era in Japan. This board was originally sawn by farmers to repair roofs. The material is chestnut wood.
Detailed size 
w192 to 197 cm 
d29 to 40 cm 
h16 to 17.5 cm  
table base size 
w108cm 
d21cm 
h14cm  
Total weight: 18.85kg 
Dimensions
Height: 6.89 in (17.5 cm)
Width: 77.56 in (197 cm)
Depth: 15.75 in (40 cm)
Style
Meiji 
Materials and Techniques
Cedar,Cherry,Woodwork