Latitude of 3 Matsuya Stores Shifts South by 0.000001 Degrees Again

At 18:44 on May 7, it was confirmed that the latitude of 3 stores in Matsuya’s official website store data had all decreased by 0.000001 degrees together. This time the stores affected were Matsuya Miyakojima Tomobuchi-cho Store in Osaka, Matsuya Route 8 Nagahama Store in Shiga, and Matsuya Sendai Ichibancho Store in Miyagi. A latitude difference of 0.000001 degrees corresponds to about 11cm on the ground.

Details of the Change

Store	Location	Latitude Before	Latitude After	Difference	Direction
Matsuya Miyakojima Tomobuchi-cho Store	2-1-15 Tomobuchicho, Miyakojima-ku, Osaka-shi, Osaka	34.7123945	34.7123935	-0.0000010	About 11cm south
Matsuya Route 8 Nagahama Store	402-1 Kobocho, Nagahama-shi, Shiga	35.3870915	35.3870905	-0.0000010	About 11cm south
Matsuya Sendai Ichibancho Store	1F Keiwa Building, 3-10-17 Ichibancho, Aoba-ku, Sendai-shi, Miyagi	38.2621421	38.2621411	-0.0000010	About 11cm south

There was no change to longitude — the correction was limited to latitude.

Cumulative Movement Since April 25

The wave of latitude corrections that began on April 25 had, until now, been a peculiar pattern in which only Miyakojima Tomobuchi-cho Store and Route 8 Nagahama Store shifted south for 3 consecutive rounds. This time, on the 4th round, Sendai Ichibancho Store rejoined them.

Store	April 25	May 1 Morning	May 1 Afternoon	May 7 (This Time)	Cumulative Difference
Matsuya Miyakojima Tomobuchi-cho Store	Yes	Yes	Yes	Yes	-0.0000040 (about 44cm south)
Matsuya Route 8 Nagahama Store	Yes	Yes	Yes	Yes	-0.0000040 (about 44cm south)
Matsuya Sendai Ichibancho Store	Yes	No	No	Yes	-0.0000020 (about 22cm south)
Matsuya Iwamotocho Store	Yes	No	No	No	-0.0000010 (about 11cm south)

Miyakojima Tomobuchi-cho Store and Route 8 Nagahama Store have now shifted south for 4 consecutive rounds, totaling 0.000004 degrees (about 44cm) south. Sendai Ichibancho Store had skipped both rounds on May 1, but this time it followed for the 2nd time since April 25, totaling 0.000002 degrees (about 22cm) south. Iwamotocho Store alone has not moved since its first shift on April 25, and remains excluded this time as well.

Timeline of Corrections Since April 25

Timing	Stores Corrected
11:30, April 25, 2026	Miyakojima Tomobuchi-cho Store, Route 8 Nagahama Store, Sendai Ichibancho Store, Iwamotocho Store (4 stores)
10:04, May 1, 2026	Miyakojima Tomobuchi-cho Store, Route 8 Nagahama Store (2 stores)
15:33, May 1, 2026	Miyakojima Tomobuchi-cho Store, Route 8 Nagahama Store (2 stores)
18:44, May 7, 2026 (This Time)	Miyakojima Tomobuchi-cho Store, Route 8 Nagahama Store, Sendai Ichibancho Store (3 stores)

The fact that Sendai Ichibancho Store skipped both rounds on May 1 entirely and then suddenly rejoined today suggests that the May 1 corrections may have targeted only “2 specific Kansai-area stores.” This time, the scope may have widened, or a separate process may have run. Meanwhile, Iwamotocho Store alone remains unchanged since April 25, still left behind.

Current Position of the 4 Stores

The latitude status, as of 18:44 today (May 7), for the 4 stores that received the first southward shift on April 25.

Store	Before April 25 Correction	Current Latitude	Cumulative Southward Distance
Matsuya Miyakojima Tomobuchi-cho Store	34.7123975	34.7123935	About 44cm
Matsuya Route 8 Nagahama Store	35.3870945	35.3870905	About 44cm
Matsuya Sendai Ichibancho Store	38.2621431	38.2621411	About 22cm
Matsuya Iwamotocho Store	35.6945556	35.6945546	About 11cm

All 4 stores share the same first southward shift on April 25, but the rhythm of subsequent corrections varies from store to store.

A Structure Where the Same Correction Value Repeats Mechanically

For all 3 stores this time, the correction value was exactly the same: “-0.0000010 degrees.” Every previous correction has also used this identical value, suggesting that rather than manual on-site adjustment, some kind of batch correction process is likely being run repeatedly. Given that Sendai Ichibancho Store skipped the May 1 processing and returned today, continued observation is warranted, including the possibility that the target set for the correction process changes from day to day.

Impact on Actual Use

The displayed map position has shifted south by a cumulative total of about 11cm to 44cm, but the actual store locations have naturally not changed. The difference remains imperceptible for practical navigation use.