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BioDivLibrary: n244_w1150
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MRSY: Minabe town Wakayama pref manhole cover（和歌山県南部町のマンホール）
FullyFunctnlPhil: IMG_1142
FullyFunctnlPhil: IMG_1122
jpellgen (@1105_jp): Hachiko Cover
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MRSY: Ikoma Nara manhole cover 2（奈良県生駒市のマンホール２）
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Bracus Triticum: Shimonoseki Manhole Cover
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Dirtyrobot: Yoshikawa Shikiriben