Add: This quote seems to false. Even in Tokaido Shinkansen (extremely utilized), it is said that rails are replaced about every 10yr. In Tohoku Shinkansen, offi

Add: This quote seems to false. Even in Tokaido Shinkansen (extremely utilized), it is said that rails are replaced about every 10yr. In Tohoku Shinkansen, officially said that it replaced about every 35 yr. > A typical Japanese maintenance schedule has each segment of rail reground, to exacting tolerances, every 6 months while total replacement is required every 5 years.