Before anyone says it, I know this a long shot

Sequence of events

• My maternal grandmother (my mother's mother) divorced my biological grandfather (my mother's father) and remarried with a Japanese man (my step-grandfather). My mother was 5 at the time (this was the 1970s)
• My grandmother and my Japanese step-grandfather had two kids together, my half uncles.
• My grandmother divorced my Japanese step-grandfather in the 1980s, when my mother was 17. At this point, my mother's and her family were living in Canada
• I was born in the early 2000s
• My Japanese step-grandfather died shortly thereafter, when I was still a baby

Notes

• I'm not sure whether my Japanese step-Grandfather ever became a naturalized Canadian citizen and relinquished his Japanese Citizenship. If he did this would have happened after he and my grandmother divorced, and before I was born
• my Japanese step-Grandfather never actually adopted my mother
  # Family tree


+----------------------+ +----------------------+
| Unknown | | Unknown |
|step-great-grandmother| |step-great-grandfather|
+-----------+----------+ +------------+---------+
| |
| |
| |
+-----+-----------------------+-----+
| |
| |
| |
+----------v-------+ +-------------v--------+ +--------------+ +--------------+
| Grand-aunt | | Step-grandfather | | Biological | | Biological |
|(Japanese citizen,| | (Japanese citizen, +--->Divorced<---+ grandmother +->Divorced<--+ grandfather |
| still living) | |died when I was young)| |(not Japanese)| |(not Japanese)|
+------------------+ +----------+-----------+ +---+-----+----+ +-------+------+
| | | |
| | | |
+---+-------------------+--------+ +------------+-------------+
| | |
| | +-------v------+
| | | Mother |
| | |(not Japanese)|
+-------v-------+ +------v--------+ +------+-------+
| Uncle | | Other uncle | |
|(half Japanese)| |(half Japanese)| +v-+
+---------------+ +---------------+ |Me|
+--+

So is there any chance I qualify for a long-term resident visa based on ancestry? I'm guessing the asnwer is no, because my step-grandfather never actually adopted my mom, but I just want to make sure