To determine the latitude and longitude of specific locations, I can provide you with the approximate values. Here are the latitude and longitude coordinates for the given countries and cities:

1. Tokyo, Japan:

•   Latitude: 35.6895° N

•   Longitude: 139.6917° E

2. Australia (as a country):

•   Latitude: Approximately 25° S to 10° S (Australia is located in the southern hemisphere, so the latitude values are negative.)

3. Canada (as a country):

•   Latitude: Approximately 60° N to 50° N (Canada is located in the northern hemisphere, so the latitude values are positive.)

4. Melbourne, Australia:

•   Latitude: 37.8136° S

•   Longitude: 144.9631° E

5. Singapore:

•   Latitude: 1.3521° N

•   Longitude: 103.8198° E

Please note that these values are approximate and represent general coordinates for the mentioned locations.