EPSG:4612 — JGD2000

GEOGCRS[
    "JGD2000",
    DATUM[
        "Japanese Geodetic Datum 2000",
        ELLIPSOID[
            "GRS 1980",
            6378137,
            298.257222101,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7019]
        ],
        ID["EPSG",6612]
    ],
    CS[ellipsoidal,2,ID["EPSG",6422]],
    AXIS["Geodetic latitude (Lat)",north],
    AXIS["Geodetic longitude (Lon)",east],
    ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
    ID["EPSG",4612]
]

+proj=longlat +ellps=GRS80 +no_defs +type=crs

proj4.defs("EPSG:4612", "+proj=longlat +ellps=GRS80 +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 4612,
  "name": "JGD2000",
  "kind": "geographic 2D",
  "area": "Japan",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    17.09,
    122.38,
    46.05,
    157.65
  ],
  "proj4": "+proj=longlat +ellps=GRS80 +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4612, 'EPSG', 4612, '+proj=longlat +ellps=GRS80 +no_defs +type=crs', 'GEOGCS["JGD2000",DATUM["Japanese_Geodetic_Datum_2000",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6612"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4612"]]');

PROJECTION
  "+proj=longlat"
  "+ellps=GRS80"
  "+no_defs"
  "+type=crs"
END

4612=GEOGCS["JGD2000",DATUM["Japanese_Geodetic_Datum_2000",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6612"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4612"]]