Resin package and light-emitting device

A resin package comprising:

• a resin portion;
• a first lead having an upper surface and an end surface;
• a second lead having an upper surface and disposed opposite the first lead;
• and
• a recess having lateral surfaces and a bottom surface that includes a portion of the upper surface of the first lead and a portion of the upper surface of the second lead that are exposed from the resin portion;
• wherein, in a top view, the bottom surface of the recess includes:
• a first side extending along the first lead and the second lead,
• a second side located opposite to the first side and extending along the first lead and the second lead,
• a third side that connects the first side and the second side, and
• a fourth side located opposite to the third side;
• wherein, in a top view, the upper surface of the first lead includes:
• a first groove overlapping the first side,
• a second groove overlapping the second side,
• a third groove overlapping the third side, and
• one or more fourth grooves extending from a portion of the third groove to an end surface of the first lead facing the second lead;
• wherein the first groove, the second groove, the third groove, and the fourth groove are continuous;
• and
• wherein a part of the resin portion is disposed on the first groove, the second groove, the third groove, and the fourth groove.