Shinro is Japanese for "compass bearing". The grid below contains 12 holes for you to locate in the empty spaces. The number of holes in each row and column is indicated by the corresponding number beside the grid. Each arrow points directly toward one of these holes. An arrow may be immediately next to the hole it points to, or all the way across the grid from it. Not every hole will have an arrow pointing to it.
Once you have located the 12 holes in the grid, use the following formulas to solve for the final coordinates. The column numbers (1 to 8) are numbered from left to right. The holes are numbered (1 to 12) from left to right, then top to bottom.
a = column number of third hole
b = column number of sixth hole
c = column number of seventh hole - column number of the first hole
d = column number of ninth hole
e = column number of first hole + column number of twelfth hole
f = column number of eighth hole
Final coordinates are N 47 40.abc and W 122 18.def.
You can check your answers for this puzzle on GeoChecker.com.