Japanese term (edited): �������R���N���[�g

This may be what you're after.
HTH

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Note added at 2 hrs 1 min (2005-08-28 13:58:27 GMT)
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From www.nisshinkogyo.co.jp/ refresh/a05.html
ルーフバルコニーは、コンクリートスラブの上にアスファルト防水を行い、押さえコンクリートを打設し仕上げていることが多いと思われます。
この様な押さえコンクリートがある場合、殆ど押さえコンクリートの上から改修を行います。

Then, based on this and other descriptions of 押さえコンクリート,

Ultra-thin Whitetopping in the USA
Bond between the concrete overlay and the underlying asphalt cause UTW to act... Because the overlay is a thin concrete slab, it has high surface area to ...
www.pavement.com/techserv/USutw2.html

Concrete Overlays
Only place overlays over a sound slab. Apply overlays in optimal weather. ...Cement or concrete overlay thicknesses can range from 1/4 inch thick up to a ...
www.askthebuilder.com/429_Concrete_Overlays.shtml

Concrete OverlayThe Department’s typical concrete overlay consists of Class SF concrete with steel fibres. The overlay will have a minimum nominal thickness of 65mm. This approach is typically used on bridge decks that originally had a 50mm asphalt concrete pavement wearing surface (no membrane) or had concrete cast to grade. The deck is showing signs of concrete delamination or other defects.
www.trans.gov.ab.ca/Content/ doctype30/production/BPG4.pdf