SET @area='{"type": "Polygon", "coordinates": [[[138.85805245, 34.61228747], [138.8580532, 34.61228431], [138.8580546, 34.61227953], [138.85805599, 34.61227475], [138.85805793, 34.61226843], [138.85806105, 34.61225887], [138.85806514, 34.61224605], [138.85806719, 34.61223956], [138.85806859, 34.61223459], [138.85806997, 34.61222954], [138.85807073, 34.61222612], [138.85807158, 34.61222259], [138.85807222, 34.61221908], [138.85807287, 34.61221547], [138.85807328, 34.61221168], [138.8580737, 34.6122078], [138.8580738, 34.61220582], [138.8580739, 34.61220384], [138.85807389, 34.61220231], [138.85807388, 34.61219915], [138.85807376, 34.61219599], [138.85807341, 34.61219284], [138.85807319, 34.6121905], [138.85807285, 34.61218824], [138.85807241, 34.61218608], [138.85807185, 34.61218392], [138.8580713, 34.61218194], [138.85807075, 34.61218068], [138.85807031, 34.61217941], [138.85806975, 34.61217833], [138.85806909, 34.61217726], [138.85806844, 34.61217636], [138.85806768, 34.61217546], 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[138.85805074, 34.61229487], [138.85805202, 34.6122891], [138.85805223, 34.61228829], [138.85805245, 34.61228747]]]}';
SET @g=ST_GeomFromGeoJSON(@area,1,4326);
SET @p1='POINT(138.858039 34.612259)';
SET @p2='POINT(138.858056 35.684722)';
SET @p3='POINT(138.858055 35.684722)';
SET @g1=ST_GeomFromText(@p1,4326,'axis-order=long-lat');
SET @g2=ST_GeomFromText(@p2,4326,'axis-order=long-lat');
SET @g3=ST_GeomFromText(@p3,4326,'axis-order=long-lat');
SELECT ST_Contains(@g,@g1),ST_Contains(@g,@g2),ST_Contains(@g,@g3);