Lit. 
      bridge-anchoring stones. The stones placed at the four corners of a stone 
      bridge ishibashi Ξ΄. Also called the hashizoe-ishi ΄YΞ, 
      hashibiki-ishi ΄ψΞ, hashiuke-ishi ΄σΞ, and tamoto-ishi 
      εΤΞ, these four stones add visual bulk and balance to a bridge and help support 
      the bank on which the bridge rests. To avoid symmetry, small stones are 
      balanced with large, low with high. In the Muromachi period, one or two 
      low stones were employed, while in the Momoyama period three higher stones 
      were used. By the early Edo period variation in stones became common. The 
      combination of stone bridge and anchoring stones is called hashi-iwagumi 
      ΄Ξg.  
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