Matsuya Miyakojima Tomobuchi-cho Store and Route 8 Nagahama Store: Latitude Nudged South by 0.000001° Again — Second Adjustment Since April 25, Cumulative Shift of About 22cm South
At 10:00 on May 1, it was confirmed that the latitude values for two stores in Matsuya’s store data — Matsuya Miyakojima Tomobuchi-cho Store in Osaka Prefecture and Matsuya Route 8 Nagahama Store in Shiga Prefecture — had both decreased by 0.000001 degrees. The same two stores had already received an identical 0.000001-degree latitude decrease on April 25, meaning that just six days later, the same pair was nudged in the same direction once again.
Details of the Change
| Store | Address | Latitude Before | Latitude After | Difference | Direction of Shift |
|---|---|---|---|---|---|
| Matsuya Miyakojima Tomobuchi-cho Store | 2-1-15 Tomobuchicho, Miyakojima Ward, Osaka City, Osaka Prefecture | 34.7123965 | 34.7123955 | -0.0000010 | About 11cm south |
| Matsuya Route 8 Nagahama Store | 402-1 Kobori-cho, Nagahama City, Shiga Prefecture | 35.3870935 | 35.3870925 | -0.0000010 | About 11cm south |
A latitude change of 0.000001 degrees corresponds to roughly 11cm on the ground. There was no change to longitude — the correction affects latitude only.
Cumulative Movement Since April 25
Both stores also shifted south by 0.000001 degrees on April 25 at 11:30, as part of a simultaneous latitude correction affecting four stores. Combined with this latest adjustment, the two stores have moved a cumulative 0.000002 degrees (about 22cm) south over six days.
| Store | Before April 25 Correction | After April 25 Correction | After May 1 Correction | Cumulative Difference |
|---|---|---|---|---|
| Matsuya Miyakojima Tomobuchi-cho Store | 34.7123975 | 34.7123965 | 34.7123955 | -0.0000020 (about 22cm south) |
| Matsuya Route 8 Nagahama Store | 35.3870945 | 35.3870935 | 35.3870925 | -0.0000020 (about 22cm south) |
The Other Two Stores Corrected on April 25 Remain Unchanged
On April 25, in addition to the two stores above, Matsuya Sendai Ichibancho Store in Miyagi Prefecture (38.2621431 → 38.2621421) and Matsuya Iwamotocho Store in Tokyo (35.6945556 → 35.6945546) also received the same 0.000001-degree southward correction. This time, only the Osaka and Shiga stores were affected — the values for Sendai Ichibancho Store and Iwamotocho Store remain as they were set on April 25.
| Store | April 25 Correction | May 1 Correction |
|---|---|---|
| Matsuya Miyakojima Tomobuchi-cho Store (Osaka Prefecture) | Yes (-0.0000010) | Yes (-0.0000010) |
| Matsuya Route 8 Nagahama Store (Shiga Prefecture) | Yes (-0.0000010) | Yes (-0.0000010) |
| Matsuya Sendai Ichibancho Store (Miyagi Prefecture) | Yes (-0.0000010) | No |
| Matsuya Iwamotocho Store (Tokyo) | Yes (-0.0000010) | No |
Only the Osaka and Shiga stores have now been targeted twice in a row. The two geographically neighboring Kansai-area stores have received the identical correction on consecutive occasions, but the store data alone offers no way to determine whether this reflects a systematic operational adjustment or something specific to these two locations.
Impact on Actual Use
Neither store’s physical location has changed, of course. The displayed position on the map has shifted a cumulative total of about 22cm south, a level that would not be noticeable in practical navigation use.
Editor's Note
Only Miyakojima Tomobuchi-cho Store and Route 8 Nagahama Store keep drifting south, correction after correction. Whether there's some algorithmic reason behind it, or whether a human hand is reapplying the same fix, remains a mystery — but it's oddly compelling that these two Kansai stores alone keep moving in lockstep, southward.
