You're quite right, though the police said that he was still conscious and responsive when he was put into the ambulance and the government is only saying his condition is "severe and he's lost consciousness":

> 警察当局によりますと、安倍元総理大臣は、救急搬送される際には意識があり、呼びかけにも応じていたということです。

> 政府関係者はNHKの取材に対し「意識はなく容態はかなり悪いという報告を現場から受けている」と話しています。

But if he still hasn't reached hospital, it seems pretty dire. It seems very possible he's already died.

EDIT: And now the government is saying they don't know his current condition[1]:

> 松野官房長官は総理大臣官邸で記者団に対し「安倍元総理大臣の容態は現在のところ不明で、引き続き確認中だ」と述べました。

[1]: https://twitter.com/nhk_news/status/1545258464179535872