Matsuya Miyakojima Tomobuchi-cho Store and Route 8 Nagahama Store Shift South Again by 0.000001 Degrees in Latitude, Just 5.5 Hours Later — Second Time Same Day on May 1, Cumulative Total Reaches About 33 cm

At 15:33 on May 1, it was confirmed that the latitude values for two stores — Matsuya Miyakojima Tomobuchi-cho Store in Osaka Prefecture and Matsuya Route 8 Nagahama Store in Shiga Prefecture — had again been reduced by 0.000001 degrees each in Matsuya’s store data. Both stores had received the identical correction just that same morning at 10:04, meaning they shifted a further 0.000001 degrees south only 5.5 hours later.

Change Details

Store Name	Location	May 1 Morning Value	May 1 Afternoon Value	Difference	Direction of Shift
Matsuya Miyakojima Tomobuchi-cho Store	2-1-15 Tomobuchicho, Miyakojima Ward, Osaka City, Osaka Prefecture	34.7123955	34.7123945	-0.0000010	About 11 cm south
Matsuya Route 8 Nagahama Store	402-1 Koboricho, Nagahama City, Shiga Prefecture	35.3870925	35.3870915	-0.0000010	About 11 cm south

A latitude change of 0.000001 degrees corresponds to about 11 cm on the ground. Longitude was unchanged; only latitude was corrected.

Cumulative Shift Since April 25 Reaches About 33 cm

Both stores have had their latitude reduced by 0.000001 degrees on three separate occasions: April 25, the morning of May 1, and the afternoon of May 1. The cumulative difference for both stores now totals 0.000003 degrees (about 33 cm) southward.

Store Name	Before April 25 Correction	After April 25 Correction	After May 1 Morning Correction	After May 1 Afternoon Correction	Cumulative Difference
Matsuya Miyakojima Tomobuchi-cho Store	34.7123975	34.7123965	34.7123955	34.7123945	-0.0000030 (about 33 cm south)
Matsuya Route 8 Nagahama Store	35.3870945	35.3870935	35.3870925	35.3870915	-0.0000030 (about 33 cm south)

Second Correction Same Day Is an Unusual Frequency

As of this morning, only two of the four stores subject to the batch latitude correction that began on April 25 — Miyakojima Tomobuchi-cho Store, Route 8 Nagahama Store, Sendai Ichibancho Store, and Iwamotocho Store — had received a second correction: the two in Osaka and Shiga. Five and a half hours later, those same two stores received a third correction, further underscoring the pattern that only these two Kansai-area stores are being repeatedly and intensively adjusted.

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

Three corrections in six days, two of them on the same day just 5.5 hours apart — this frequency is clearly unusual for store-data coordinate corrections. The fact that the same correction value (-0.0000010 degrees) is being applied mechanically each time suggests this is more likely a batch correction process running repeatedly at short intervals than a manual, on-site adjustment.

Correction Pattern

Sendai Ichibancho Store and Iwamotocho Store received only the single correction on April 25, and their values have not moved since. Miyakojima Tomobuchi-cho Store and Route 8 Nagahama Store, on the other hand, are the only two to have been corrected three times in a row in the same direction — one possibility is that some discrepancy exists in the underlying source data specific to these two stores (beyond the seventh decimal place of latitude), and a process is repeatedly rounding it down in stages. However, the specifications of the store data itself have not been disclosed, so this cannot be confirmed.

Impact on Practical Use

The map display position has shifted a cumulative total of only about 33 cm south — the actual store location has, of course, not changed. The difference remains imperceptible for navigation purposes.